>>127621514 (OP)
Basically all listeners of nu-metal in Current Yearβ’ are autists
Cringe EDM and electroswing (listened to by extreme autists who are unaware, and "ironically" by the aware ones) also showtunes
Hyperpop slop and adjacent
Math-rock
Videogame soundtracks
You mentioned Genesis and Dream Theater but really almost all prog is autistic, although it's a different type of autist, usually not the gay milleintard / zoomer one
On the topic of non-gay-deviantart autists, "IDM" or braindance music is something those kind of old fashioned autists love
Someone would say classical, but classical is kinda universal although I guess to really delve deep you need to be kinda autistic. I actually think something like medieval music would probably have more appeal for autists as it's more "obscure", not like listening to "stock medieval" but actually seeking out whatever was made back then, researching it.