Speaking of ABB, possibly my favorite live band right now is Tedeschi Trucks Band. They are just fire live.
I saw ABB first at Bonnaroo, they played the What stage right before DMB in 2005 and, for my money, were better than DMB that night. They just blew the doors off the place. I've seen them a few other times as well, they always put on a great show.
I'm also just now getting into the Dead. They were a band that has always been in the background for me. I only got into Phish in the last 15 years, and I've slowly expanded my jamband interest. The Dead came back on my radar because I've been following this guy on YouTube:
https://www.youtube.com/channel/UC5r...6AN8qnRCZ_RkPA
Highly recommend his channel if you like music theory or just like to hear someone who knows music talk about what they are hearing. He has a great ear. A few key vids:
Ocean by John Butler
https://www.youtube.com/watch?v=_TxwEIyq-Wg
Shakey Graves - Roll the Bones
https://www.youtube.com/watch?v=gAP2VT9hQuI
TTB - Midnight in Harlem
https://www.youtube.com/watch?v=FDI304JFFdw
He's also doing the entire (or most of) Cornell '77 show, so there is a ton of Dead stuff if you want to see that.