I'm going to recommend the Captain America Anniversary Tribute book, if you like the concept (which I do) and like seeing various artists draw Namor (which I do). It was a bit pricey at $6.99, but it's not like Marvel is giving me anything else to spend my Namor dollars on at the moment.
Anyway, it DOES reproduce the entire Avengers #4 issue, so there's several pages of Namor.
Besides the above Dodson page, Joe Bennett, Rachael Stott, Greg Smallwood, Greg Land, Iban Coello, Natacha Bustos, & Mark Bagley do Namor pages. I'll try to post pages later -- though I'm supposed to watch the Snyder Cut Justice League tonite and may end up comatose.