I've heard Flogging Molly, they were ok. And Reel Big Fish is ska-core, which is the majority of what I listen to (ska, that is).
And I've listened to some Rancid and it was ok, I remember some horns in some of their songs though.
I like that Rancid song they play on the radio.
Never heard of Unseen, the Pinkerton Thugs, and Funeral Oration, I'll check em out.
Thanks