The chief antagonist of Ice Age: Continental Drift (2012) is Captain Gutt, a gigantopithecus pirate, voiced by Peter Dinklage.
His hat is actually his hair! I like that detail.
He was originally conceived as more yeti-ish (sketches by Peter de Sève):
Because tomorrow is 'Talk Like a Pirate Day', here are a couple more BONUS Not Yeti Pirates:
Ratbeard from Pirate101 (game):
And Old Tom from Muppet treasure Island: