I thought Grifter would work out, though.
I'm really surprised none of the Suicide Squad people are Wildstorm refugees. Rose Tattoo or Zealot, for example.
The really problematic WS people are the Authority and Majestic and to a lesser degree quasi-obscure properties like Sleeper. Then again, they publish Batman comics, I'm sure Sleeper could fit in somewhere. Ed Brubaker might get mad tho.