Oh man if you don't want Erwin then I'll take him (♥ω♥ ). His strong features, substantial build and solemn demeanor is very aesthetically pleasing to me. I'm not sure if he's meant to be objectively good-looking, but I do remember Levi, Hanji and the guidebook implying that he looks dashing. However in the manga, I believe only Historia (by everyone), Eren (by Hanji) and Mikasa (by Jean) have been noted for their good looks.
I think Erwin is intended to look handsome.
I guess my personal taste deters me from people with overly strong features (like the cheekbones and the eyebrows and stuff haha) but I think that things like strong cheekbones and a sturdy stature are generally perceived as attractive by society in general.