Chosen Solution
I had my note 5 for a long time now. After having it for some months I decided to root my phone. Every thing went well then I started to uninstall system apps like Power point, Word, samsung email and s voice but I clicked on touchwiz home therefore uninstalling it. I tried getting apks but they all say the samething “The Package conflicts with an exiting package by the same name” I checked in all apps and in file explorer to see if there was a package named the same but did not find it. I have also tried factory reset it did not work.
Since you have already rooted the phone, the quickest way to fix this would be to backup your files (maybe use Samsung Sync) to a PC/MAC, and then use ODIN to reflash another ROM. See this forum. https://forum.xda-developers.com/note5 Also, as a note (no pun intended), as of Android 6, you can disable apps so they no longer show up on the launcher.
