That is the minimalist look - equal parts positive and negative space inside the aquarium. The 1st one looks good for "swimmy" fish, and the 2nd one is called the "bonsai" inspired scape.
Remember this is an angler tank. There will only be one fish, other than at feeding time. The anglers behavior is mostly walking around the sandbed and perching on corals and outcroppings. Therefore, lots of sandbed is a must as well as a few nice perch areas.
Honestly, I am going to try to incorporate some style from all three. Thanks for the vote!