Depends on the need.

For a slightly too long frame the Soma Hy 1 is great
For a perfect fitting frame where you spend time between the hoods and the tops, then the Nitto Noodle is nifty
For a classic bike with narrow hoods and external routing, then I like something like the GB rando bars
For classic road riding, many of the Cinelli bars work really well (forget the bends but the one that's 26.4 has lots of room in the drops)
Off road and upright, I like a swept back MTB bar, or better yet a classic set of bullmoose Nitto's