These are just my favorite comic artists in no particular order. I don't know most of the classic artists because I only got into comics recently, so don't call me out on that.
I'm a big X-23 fan and I absolutely loved his work with Target X. He was my favorite artist to the character. Also seen his work on X-Force.
Once again, I know her from the X-23 series, which I enjoyed. A female artist, something I don't see a lot. Very lush characters with very expressive eyes. Her work kinda gives an anime/manga feel to western comic books.
Does great variants. He actually designs the Iron Man armor for the movies. Very detailed and vibrant colors.
J.H. Williams III,
Phenomenal artist and a pretty good writer too. First got to know his work when I started reading Batwoman because I heard great things about his artwork. Does very creative, two-page spread with unorthodox panels. Hard to describe, see for your self.