6’6″ here, with humongous legs. XXL Stumpjumper 29er and 22″ Orange Five 26er. Both fit really well, the Stumpy being the bigger of the two.
The bizarre thing is, you’d imagine tight switchbacks would be harder on a bigger bike, since swapping to bigger bikes I’m finding them drastically easier. Just having a bit more space over the bike makes a world of difference.
The XL Ibis Mojo I once had being the most tragic, very short wheelbase, I couldn’t climb or descend on it, very simple switchbacks I was embarressingly bad at. Lifting the front wheel was easy on the plus side! :/