Bands similar to sneaker pimps!

Hey guys, just discovered this whole trip hop thing! I'm really into sneaker pimps, and massive attack come to think of it, more sneaker pimps though and I was just wondering what 'trip-hop' artist i should discover next? anything similar to sneaker pimps other than portishead? i just like the whole, underground sound to it, bit dark!

Anyway thankyou!

dele