In my opinion, "ClefJ's Karthwasten" by ClefJ is visually the best reinterpretation of Karthwasten in terms of its story. But not many patches are available. I'll propose some here as long as I keep wanting to use it.
Patches made for :
Climb Watertowers of Skyrim
Crows and Ravens- Mihail Monsters and Animals
Drinking fountains of Skyrim
Farmhouse Chimneys SE
Immersive Laundry
Landscape Fixes For Grass Mods
Lux Orbis
Medieval Lanterns
Watertowers of Skyrim
Woodsheds of Skyrim