Those who like to knock the musicianship of Jerry and company forget their body of work consists primarily of live shows, and there were mistakes and miscues. Listen to any of their studio work and it’s polished--as any group’s songs would be rehearsed, re-done, on tracks, etc.
The GD weren’t all the best players, but they invented the "jam band" rock genre. Listen and watch them playing outdoors at Columbia University on 5-3-1968. A lot of the kids didn’t know what to make of it--they were hearing Tommy James and Gary Puckett on the radio then, and here’s Jerry, holding forth with improv jamming that no one was doing then. He was very good early on--drugs wore him down later in life.
If you like the 2 1/2-minute song, stick with the Beach Boys. They were good at what they did, as well. Danny Gatton and many others were/are great, but for those of us who aren’t stuck to technique and proficiency, it’s often the whole presentation that captures us emotionally. I could not pick the best song ever written--too much to like, but really, bdp--go that Columbia U. concert and then tell me Jerry wasn’t a pioneer, and get back to us here--thanks!
https://youtu.be/zq8sp6WF3bQ