...I think it's a real shame that more bands weren't influenced by them. Sure, you can (logically enough) find a similar style in some Six Feet Under and Lowbrow, but other than that, I don't hear a lot of Obituary influence at all.
Call me a stupid old bastard if you like, but I'd much rather hear atmospheric, mid-paced death metal than br00tal or tech-death.
I've always found Jungle Rot's style to be very similar to Obituary
www.myspace.com/junglerot
If you like Obituary... and you should... they might be worth a listen for you.
Jungle Rot > SFU
Cianide also sound like Obituary, and are better than both bands.
Is that your patch jacket?
I'd go with Frozen in Time for best Obituary album. Something about the great drumming and the really unique guitar work just does something to me, although most will disagree.