Gen 1 pokemon that haven't gotten some kind of support (evolution, mega, dynamax, regional form, etc) since the original game:
>Fearow, Arbok, Parasect, Venomoth, Golduck, Victreebel, Dodrio, Dewgong, Hypno, Seaking, Jynx, Omastar, Kabutops
You can also argue Mew either way, since it always gets all TMs. The Hitmons are also questionable, since their support is just another Hitmon.