Get Back really is phenomenal and worth the price of a month of Disney+. It's a fascinating look into the process of creating a great album.
The only band I've seen multiple times with a huge back catalog is U2 and I'm a big enough fan that I'm still into their new music. I saw them on 2 tours that focused on new albums and they did a good job of balancing in older music. I last saw them in 2017 when they celebrated the 30th anniversary of an album by playing it straight through. Only the encore had songs released after that album and they were all more than 15 years old.