By George Gross. Illustrateurs has a ton of these Men's Adventures-type covers, each more nuts than the last. In addition to sharks, gators, tigers, rhinos, and the occasional island girl, thrill to the sight of dudes fighting turtles (with a knife!), giant otters, and weasels. Awesome.
Aquaman
By Brian Denham.
Deerslayer
By NC Wyeth. I did a lot of canoeing through gator-infested rivers with my dad and brothers as a kid, so this may not be as cool to you guys as it is to me, but Golden Age Comic Book Stories dedicated an entire post to canoe-themed art. Brings back great times.
After the break: Elektra, Zatanna, Aurora, Mary Marvel, Cleopatra, and the best Wizard of Oz ever.