I love Namor. I don't even think it is that hard to write good Namor. Stern, Johns, Bendis, Hickman, Fraction all gave us some sweet Namor moments, based around the simplicity of the character. I don't mean that in any bad way. Throw him into a team of Avengers that has no other flyers and I think he would work very well. Ever notice how hard it is to draw a convincing Namor? Maleev made him into a rat man. Most artists flatted his head too much for my liking. I'm better with writers than artists, but i think it was Deodato that nailed it.
Byrne and Buscema (John or Sal) drew a great Namor.