The Rolling Stones needed someone to tell them to reign it all in a bit. They made dozens and dozens of terrible songs. Too many albums, too much filler and shite. If there was someone telling them to increase the percentage of quality by not being so quick to release something new, they could have been so much better. It's about quality not quantity!
[The exact same thing applies to The Beatles!]
That being said, they could be good and when they were good they were great. In fact they were superb!
I like Radiohead. They were decent.
But my vote goes to The Rolling Stones for how good they could be at their best. Still a number of better bands than these though!