It is my impression that in most Star Trek episodes after TOS (across all the series), alien species are shown as white people with bumpy heads. On TOS alien species are mostly white people in different costumes.
So I am curious what species (in any Star Trek Series) are shown with most members of the species we see being acted by mostly non-white human actors? Yes, this question counts even species where we just as few as one individual.
Lets ignore non humaniod species, and ignore those (like the Andorians) that are painted a totally non-human color.