Map Compilation comparison(updated). If you see any map markers that don't show up, comment them. If you see any you haven't discovered yet, go check them out! : r/beyondskyrim
Enderal - Colored Map markers _Link_ at Skyrim Nexus - Mods and Community
Custom Map Marker Redone at Skyrim Nexus - Mods and Community
Atlas Map Markers SE - Updated with MCM (by kryptopyr) - Skyrim SE Mods - Step Modifications | Change The Game
Skyrim Map Markers by JakeDK | Download free STL model | Printables.com
Surprisingly I couldn't find one already so I made a map showing dungeon levels (1st version) : r/skyrim