I wouldnt even know where to begin for a top 50 list... I could name 100 bands and my favorite song from each artist. And whittle those down. But ordering those? Good god man.
Rolling Stone made another list, the greatest guitarists of all time. https://forum.chorus.fm/threads/rolling-stones-250-greatest-guitarists-of-all-time.65835/
"As It Was" is a nice little pop song, but c'mon, that ain't one of the 500 greatest songs of all time.