Uni-the-Unicorn!
Hero
Art in the 1e-3e area was all over the place IMO. There is good and bad. 4e was more consistent and better on average, but not quite my style for a lot of the edition. 5e has been better. Similar consistency to 4e, but more my style. The technical quality of the art has improved over the edition too and the 2024 core and beyond look to be some of the best art ever.I thought art from 3 0-4E was fairly bad tbh. Went from nice 2E colour hardcovers to poo brown windows and 4E WAR core books. Not a fan of his art.
There was the odd exception like 3.5 Draconomicon, Tyrants of 9 Hells etc.
5E was an improvement.
All the above IMO.