Here is a nice gray wallpaper that is not annoying and is easy on the eye. (1440×3120)

The Side Key may need to be configured so that it is useful once Bixby is removed.

Settings → Advanced Features → Side Key → Press and Hold → Power Off Menu

You need to install ADB on your computer, then enable Developer Options and USB Debugging on your phone.

#Verify you phone is connected
adb devices

#Start the ADB shell to enter the following commands
adb shell

#Edge Display
pm uninstall --user 0 com.cnn.mobile.android.phone.edgepanel
pm uninstall --user 0 com.samsung.android.service.peoplestripe
pm uninstall --user 0 com.samsung.android.app.sbrowseredge
pm uninstall --user 0 com.samsung.android.app.appsedge

#Samsung Email & Calendar
pm uninstall --user 0 com.samsung.android.email.provider
pm uninstall --user 0 com.wsomacp
pm uninstall --user 0 com.samsung.android.calendar

#Samsung Bixby
pm uninstall --user 0 com.samsung.android.bixby.wakeup
pm uninstall --user 0 com.samsung.android.app.spage
pm uninstall --user 0 com.samsung.android.app.routines
pm uninstall --user 0 com.samsung.android.bixby.service
pm uninstall --user 0 com.samsung.android.visionintelligence
pm uninstall --user 0 com.samsung.android.bixby.agent
pm uninstall --user 0 com.samsung.android.bixby.agent.dummy
pm uninstall --user 0 com.samsung.android.bixbyvision.framework

#Samsung Pay
pm uninstall --user 0 com.samsung.android.spayfw
pm uninstall --user 0 com.samsung.android.spay

#Samsung Pass
pm uninstall --user 0 com.samsung.android.samsungpassautofill
pm uninstall --user 0 com.samsung.android.authfw
pm uninstall --user 0 com.samsung.android.samsungpass

#Samsung AR Emoji
pm uninstall --user 0 com.samsung.android.aremoji
pm uninstall --user 0 com.sec.android.mimage.avatarstickers
pm uninstall --user 0 com.samsung.android.emojiupdater

#Samsung AR Zone
pm uninstall --user 0 com.samsung.android.ardrawing
pm uninstall --user 0 com.samsung.android.arzone

#Samsung Sticker Center
pm uninstall --user 0 com.samsung.android.app.camera.sticker.stamp.preload
pm uninstall --user 0 com.samsung.android.stickercenter
pm uninstall --user 0 om.samsung.android.stickerplugin
pm uninstall --user 0 com.samsung.android.app.camera.sticker.facearframe.preload
pm uninstall --user 0 com.samsung.android.app.camera.sticker.facearexpression.preload
pm uninstall --user 0 com.samsung.android.app.camera.sticker.facear.preload

#Facebook
pm uninstall --user 0 com.facebook.katana
pm uninstall --user 0 com.facebook.system
pm uninstall --user 0 com.facebook.appmanager
pm uninstall --user 0 com.facebook.services

#Printing Service Components
pm uninstall --user 0 com.android.bips
pm uninstall --user 0 com.google.android.printservice.recommendation
pm uninstall --user 0 com.android.printspooler

#Samsung Game Launcher & Settings
pm uninstall --user 0 com.samsung.android.game.gamehome
pm uninstall --user 0 com.enhance.gameservice
pm uninstall --user 0 com.samsung.android.game.gametools
pm uninstall --user 0 com.samsung.android.game.gos
pm uninstall --user 0 com.samsung.android.gametuner.thin

#Samsung Gear VR
pm uninstall --user 0 com.samsung.android.hmt.vrsvc
pm uninstall --user 0 com.samsung.android.app.vrsetupwizardstub
pm uninstall --user 0 com.samsung.android.hmt.vrshell
pm uninstall --user 0 com.google.vr.vrcore

#Samsung Kids Mode
pm uninstall --user 0 com.samsung.android.kidsinstaller
pm uninstall --user 0 com.samsung.android.app.camera.sticker.facearavatar.preload
pm uninstall --user 0 com.sec.android.app.kidshome

#Samsung LED Cover
pm uninstall --user 0 com.samsung.android.app.ledbackcover
pm uninstall --user 0 com.sec.android.cover.ledcover

#Edge Display
pm uninstall --user 0 com.cnn.mobile.android.phone.edgepanel
pm uninstall --user 0 com.samsung.android.service.peoplestripe
pm uninstall --user 0 com.samsung.android.app.sbrowseredge
pm uninstall --user 0 com.samsung.android.app.appsedge

#Samsung Dex
pm uninstall --user 0 com.sec.android.desktopmode.uiservice
pm uninstall --user 0 com.samsung.desktopsystemui
pm uninstall --user 0 com.sec.android.app.desktoplauncher
pm uninstall --user 0 com.sec.android.app.dexonpc

#ANT
pm uninstall --user 0 com.dsi.ant.sample.acquirechannels
pm uninstall --user 0 com.dsi.ant.service.socket
pm uninstall --user 0 com.dsi.ant.server
pm uninstall --user 0 com.dsi.ant.plugins.antplus

#Misc
pm uninstall --user 0 com.cnn.mobile.android.phone
pm uninstall --user 0 jp.gocro.smartnews.android
pm uninstall --user 0 com.synchronoss.dcs.att.r2g
pm uninstall --user 0 com.wavemarket.waplauncher
pm uninstall --user 0 com.pandora.android
pm uninstall --user 0 com.sec.penup
pm uninstall --user 0 com.samsung.android.service.livedrawing
pm uninstall --user 0 com.linkedin.android
pm uninstall --user 0 com.hunge.app
pm uninstall --user 0 com.greatbigstory.greatbigstory
pm uninstall --user 0 com.android.documentsui
pm uninstall --user 0 com.drivemode
pm uninstall --user 0 com.cnn.mobile.android.phone
pm uninstall --user 0 com.bleacherreport.android.teamstream
pm uninstall --user 0 net.aetherpal.device
pm uninstall --user 0 com.wb.goog.got.conquest
pm uninstall --user 0 com.wb.goog.dcuniverse
pm uninstall --user 0 com.innogames.foeandroid
pm uninstall --user 0 com.gsn.android.tripeaks
pm uninstall --user 0 com.foxnextgames.m3
pm uninstall --user 0 com.audible.application
pm uninstall --user 0 com.samsung.android.livestickers
pm uninstall --user 0 flipboard.boxer.app
pm uninstall --user 0 com.samsung.android.app.tips
pm uninstall --user 0 ru.yandex.searchplugin
pm uninstall --user 0 com.samsung.android.mateagent
pm uninstall --user 0 com.samsung.android.drivelink.stub
pm uninstall --user 0 com.google.ar.core
pm uninstall --user 0 com.samsung.android.wellbeing
pm uninstall --user 0 com.samsung.android.da.daagent
pm uninstall --user 0 com.samsung.android.service.livedrawing

#########################################

#Some people may want or need these...
#I use Outlook, Firefox, NewPipe and CentreStack instead

#Samsung Theme Store
pm uninstall --user 0 com.samsung.android.themestore

#Microsoft OneDrive
#pm uninstall --user 0 com.microsoft.skydrive
#Microsoft Office
#pm uninstall --user 0 com.microsoft.office.officehubrow
#Microsoft SwiftKey
#pm uninstall --user 0 com.touchtype.swiftkey

#Google Gmail
#pm uninstall --user 0 com.google.android.gm

#Google Chrome
#pm uninstall --user 0 com.android.chrome

#Google TV
#pm uninstall --user 0 com.google.android.tvlauncher
#pm uninstall --user 0 com.google.android.app.tv.launcherx
#pm uninstall --user 0 com.google.android.videos

#Youtube
#pm uninstall --user 0 com.google.android.apps.youtube.music
#pm uninstall --user 0 com.google.android.youtube