The missus is not really into live music or any of the bands fully, but she thoroughly loved Weezer, Fallout Boy and Green Day. I've seen Weezer and Green day at various gigs/festivals, so I know they are great live acts.
Festivals are weird all round though, the crowd can be very hit and miss as they aren't all necessarily there for the acts they are seeing, especially the main ones. For a 20 yo Billie Eilish to a 80 yo Macca though, I think they have held court enough for me to wish I'd have been there for both. Even if the sets lulled at times.