OP, are you talking about male Tieflings? Because I made a female Tiefling and dare say, she's quite pretty imo.
I did make a male Tiefling for my first run as a "dream guy" and he was very, very acceptable. But more choices for faces certainly wouldn't hurt.
Yeah the men. Im not asking for an incubus (but also, maybe like an incubus level handsome?) but if you look at someone like Asmodeus, he is described "Overall, he had charismatic and beautiful looks that captivated people." Tieflings described as alluring and charismatic. They are supposed to be literally otherworldly in their looks and devilish doesn't mean ugly. Some are from fiends - something that presents itself into the gehenna realm for yugoloths and stuff would be great, much more striking in their aggressive look. Now, some lineages are much diluted through time on the prime material with their breeding behaviors and have taken on more human characteristics. Something from captivatingly beautiful even for males to something thats uncannily human (which these seem to be closer to) so you can kind of pick your newness to the plane and your family tree kind of a thing.
I know its EA, but I like a lot of the other races, they are just blah for the male tieflings.