I honestly haven't gotten to the point where I'm following artists. Most of the time it's either a series I'm checking out or a writer. That said some of my favorite art was from Batman comics since he really lends himself to comic book art.
Neal Adams kind of blew my mind when I started reading his Batman stuff from the 70s. Gone was the camp of the 60s Batman show, replaced by a moody, noirish style full of detail and negative space. Basically this was where Batman entered the modern age, and every iteration of him since has been heavily informed by Neal Adams' style.
Tim Sale is another artist I found through Batman, specifically the Long Halloween graphic novel, which was the second Batman story I ever read. I've never seen another artist like him tbh. The linework, the colors, the overall approach to drawing a superhero comic. It's just so lush and beautiful to look at.
And hella props to his work on Spider-Man Blue as well.