By Rick Burchett. [From the graphic novel he's working on with writer Christopher Mills]
By Andrew George Brown. [Lots more at Etsy by way of Wondermark]
From the Depths
By Matt Wiegle. [Seriously, if you're not reading his and Sean T Collins Destructor webcomic - from which this is a page - you're missing out.]
Aquaman: King of the Seas
By Braden D Lamb.
By John William Waterhouse. [Golden Age Comic Book Stories]
By Alex Schomburg. [Golden Age Comic Book Stories]
Ka-Zar, Shanna, and Zabu
By Brent Anderson. [Giant-Size Marvel]
By Red LYUBA. [More here]
By Jason Barton.