Not sure band of horses is a good example. The second album didn’t change the sound loads but it was definitely a poppier, more mainstream album than the first for example.
I read quite a good comment about RHCPs today, the source was uncredited:
“The first time I saw them, I thought it was some kind of adult Make-A-Wish scenario, because you have these three amazing musicians just jamming out, and then suddenly this grown man in a diaper runs on stage screaming ‘Yabba-dabba-dabba-doo-now!’”
Anyway, my suggestion for this thread would be Radar Bros - every album is very similar and usually great.