I never take more than a 60 lr bag. All the essentials fit without leaving room for me to bring piles of crap I won’t use anyway. The more space you have, the more ‘things you can’t do without’ magically appear. Limit the space, limit the tendency of bringing ballast.

I think 60l is fine. My ideal bag is probably 55l. 60l might be a little bit bigger than is absolutely necessary, but it’s not huge, and you’re a big guy so you can easily handle it.

60L should be fine. You can always strap your shoes to the outside of your pack in a real pinch if they won’t fit.