Get some Freddie King, especially Burglar which is a sublime mix of Texas blues and 70's funk. Early ZZ Top cannot be faulted either. John Lee Hooker's 70's output is pretty cool too, lots of extended boogies. It's not all about 12 bar, you know. Albert King was fantastic too, guys who played songs rather than just solos and always had excellent bands behind them.
I don't "get" Joe Bonamassa's blues. I've listened to several albums but he just leaves me cold.
Not strictly blues but if you want to hear slide guitar played with unreal skill and melodic sense, check out Sonny Landreth, he'll have your jaw on the floor.