Batman.
Hell, Cap has possibly just as many issues as Batman. He's guilt over Bucky is always being resurfaced, with Bucky alive he's even more confused, all the people he used to know in the 40's are pretty much dead or in a retirement home wearing depends, he can never trust his own government, he always is living in the past (listening to the same old music, watching the same old movies), and he's had enough problems with the Avengers that he's stuck taking a backseat to Wolverine now.