I doubt it was an actual bullpen, but the 80's Fantagraphics roster has the most people I'd like to shake hands with that I can think of. And Groth's attitude of "It's done when it's done, as long as it's good." seems preferable to "GET IT DONE NOW!"

I'm sot sure if EC was a bullpen or not either, but if they were that's my substitute choice. Everyone was immensely talented and their philosophy on social issues seems to have been ahead of it's time.