strawberry alarm clock, animal collective, deakin (member from animal collective), eric relph, mid air thief, soft machine, cleaners from venus, can, his name is alive, deerhunter, cluster, and uhh frank zappa. some of these hit the dot on psychedelia while others kinda just dip their leg in it (if that even makes sense??? lol)
if you wanted more psychedelic artists from the 60's rather than many spanning over different decades like i gave lmk!! i can also suggest an album from each artist that i suggested if you want that too.
also love the brian jonestown massacre pfp