These are some of the greatest designers in history. I encourage a visit and a read.

Paul Rand (paul-rand.com)
Milton Glaser (miltonglaser.com)
Kalle Lasn (activistcash.com/biography.cfm?bid=3438 and adbusters.org)
Peter Saville (btinternet.com)
Saul Bass (designmuseum.org/design/saul-bass)