I'd have to say Angel Eyes. Indio Killing a woman and baby is the mark of a coward not a bad ass.
A bad ass beats you and lets you live to think about it with no regard weather you're a man or woman.
The look on Tuco's face when he snapped the case on his fingers is the mark of a bad ass. And after slapping the fresh whore in the territory all he did was continue to press his point. When he was no longer a bad ass happened at the shootout. Look at his eyes...he know he's at a disadvantage but has no alternative but to stick around and try and shoot his way out of the predicament he's in. His eyes told the whole story...and the failure shown in them when he was on his knees looking at Blondie showed how he knew that his days of a bad ass were moments from ending. more on that later. Sorry Angel Eyes...no gold for you.
This is a nice post AE, I like the way you think.
The only sweet spot he ever showed was when he bought half-soldier a drink...
I must admit you're wrong on this. Groggy is right, he actually provided 2
drinks - the first to Half Soldier, and the second to the soldier in the ruined fort (look one of my previous posts on this topic for the pic).