Slightly knows his stuff.
Some artists that he hasn't mentioned:

Old stuff: Hopeton Lewis, John Holt, The Paragons, Phillys Dillon, The Melodians, The Techniques.
Check out The Slackers for new stuff. Also check out The Bluebeats for some recent (mid 90's) stuff that is a throwback to the trad stuff.

A great comp that I have is "20 Greatest Hits of Treasure Isle Vol. I" if you just want to look that up and not have to do too much digging.