mike deodato jr (the biggest one, specially for anatomy, but I also love the faces)
araki (for general aesthetic, and I love how not stright forward his actions sequences are)
ayami kojima (his influence was more likely noticed in my last work, The Ghoul, than my current one, but still)
miura (i love his designs and aesthetic)
obviously there's a lot more, but these are the ones that come to mind