I don't see any anime there from Watanabe, so give them a go (Cowboy Bebop, Samurai Champloo, Kids on the Slope, Space Dandy, and Terror in Resonance). His dubs are always superior to the original, especially Bebop. Seriously, watch it any other way and you will wreck the experience (it's '98, but for its time, it probably had the best animation out there

).
Baccano! and Durarara!! are both fantastic. The second one swings either way but the first is another one that needs to be seen dubbed.
And I don't see Clannad, Eden of the East, Mushishi, and Monster either, so them too. The first two are fine either way, but I found both dubs superior for the other two (especially Monster).