I voted for kodos, Longshot hero, The Untouchables, Mighty Mighty Bosstones, Less Than Jake, Five Iron Frenzy, Supertones, Skeletones,The Toasters, Reel Big Fish, Rx Bandits, Kings of no Good, Homegrown, **** just check out:
http://www.billtanner.net/ska/skabands.html for a huge list of totally awesome ska bands. Just about every single ska band ever known to mankind is on there.