Some of my favorite songs:
Under Me Sleng Teng - Wayne Smith
Chase The Devil - Max Romeo
Police and Thieves - Junior Murvin
In These Times - Lee "Scratch" Perry
Ring the Alarm - Tenor Saw
If there is any name you should remember when it comes to reggae its Lee "Scratch" Perry. The guy is a reggae god. He has produced some of the best reggae songs ever. You should check out his 3 disc set called the 'Arkology'. It will give you a good idea of what is out there. the guy was so insane that one night he wrote on every square inch of his studio walls. And later burned it down when he was drunk on wine (so he doesn't drink wine anymore). I believe he produced very early Bob Marley before Bob went to Coxsone Dodd, the founder and main producer at Studio One (like roachboy said, the motown of reggae).
If you go to
www.allmusic.com you can loads of info of similar artists and what not.
There is not a day that goes by without some reggae riddims being played in my house, car, or at work.
Some good comps you may want to check out are the Studio One comps. You can build so much off of those.
But please keep in mind there is more too reggae than bob. Sure he is good and a 'Legend', but I have about 60 or 70 reggae albums, and only 2 or 3 Bob Marley ones (which he happened to be working with Scratch on).
Oooo...also check out Horace Andy. Soooooo good.