If you really don't know (which is scary)...
Steve Cropper was the guitarist for Booker T & the MGs. They were a band in and of themselves. Surely you've heard the instrumentals "Green Onions" or "Time Is Tight" (virtually a staple still on the Letterman show) or "Hiphugger".
More importantly, they were the backing band in the studio for roughly a gazillion famous artists that came out of the "Stax Sound"--"Southern Soul" as it was often called. Otis Redding, Bill Withers, Sam & Dave, Wilson Pickett. He was a player with all of them, in addition to producing and arranging credits on many of the records.
He played a Telecaster by the way, nearly exclusively.
Ever seen "The Blues Brothers"? (If you say no I'll drive down there and smack you). Steve Cropper and Donald "Duck" Dunn (The bassist in the picture above) are part of that band. The Band Elwood, The BAND!!!