Earth, Wind & Fire are pretty righteous. Not to mention that they wrote some absolutely killer songs (including 'After The Love Is Gone') in collaboration with Westcoast-AOR gods David Foster and Jay Graydon, all of whom will be getting a spotlight in my upcoming Yacht Rock-oriented journal.
As far as Phillip Bailey goes, I think a lot of people mostly know him from the song 'Easy Lover' that he cooked up with Phil Collins and the ever-prolific bassist Nathan East. Good tune.