Henry Fonda in "My Name is Nobody"
yes
yes
waterloo?
Start the Revolution without me (1970)?
The fly scene..
once upon a time in the west
Yes, exactly (...and it was in the pistol barrel ). That's Jack Elam - who was long cast as archetypical western baddie, and although he brought an element of humour to all his performances, it took decades for him to be recognised as the master of comedy he was!
The Omega Man?
yes