Newbie question (I know sigh roll eyes = use search function) lol

looking for feedback on better models for a rider with L leg TKR range of motion issue limited bend max of 113* (looking at revision new year maybe will improve maybe not)
cant ride for any length of time if my knee to seat ratio puts a demand on the knee excruciating pain issue. Looking for a more relaxed or forward'ish foot position.
No "shifting" issues with L foot but feedback on auto shift v manual is welcomed.
RT maybe more bike than I need? (If such a thing is possible)
ST?
F3 seems "feet forward"

Many years on 2 wheels, now want a bike to weekend with but fear the "bulk weight" on the leg. Been on a HD sportster for a bit now that I've healed up and have the leg strength and confidence back to ride, but want to get "more bike" for weekend/overnight rides etc..
3 wheels takes that out of the mix. Just need to have some relaxed leg position.
Me: 5'8" 30" leg length.

thnx in advance!