The three figures you your left are Artizan.
The figure on the left is from Artizan's set AWW001,
Ill Buono, Ill Brutto, Ill Cattivo
If the Artizan figures weren't already based, I might have been able to give you an even better comparison, but I didn't have the heart to pry them off the stands! As it is, I think they are reasonably well matched, and could be mixed in one "unit."
Artizan makes two packs of three banditos each plus the Mexican from AWW001. The other large collections of banditos I've been able to find are from Black Scorpion miniatures, although I don't have any. They are beautiful figures, and if someone would like to photograph one of theirs alongside one of mine, please send me the photo and I'll post it.