Sounds like a great question; although the novel suggests otherwise. For people who havent read "The FountainHead" , I recommend that you read it. Howard Roark is the quintessential man who is "as man should be" while Peter Keating is the supposed "the man who couldn't be, and doesn't know it". Roark is ideal; he falls to the edge of wretchedness before regenerating from the ashes - ideology is his life. Keating is pragmatic, wants to be liked, and is a victim of his own desires.
He embodies the result of a soulless man devoted to altruistic means. Rather Intriguing!