I wasn’t that bothered by historical inaccuracy but I did feel some of the fictional choices were strangeand I think The Left Handed Gun was a big influence. I also couldn’t see the point of the Liberty Valance twist ending.
Pat Garrett & Billy the Kid is my favourite Billy the Kid movie although it’s more about Garrett than the Kid. Young Guns is my second favourite.
I agree with your point about revisionist films. Historical inaccuracy in a revisionist western like Doc (about Wyatt Earp) bothers me more than it does in something like My Darling Clementine because it seems to be trying to pretend to be ‘the truth’ whereas MDC isn’t really about Wyatt Earp at all but using him as a symbol (and I’d say Peckinpah’s movie is the same).