I've always followed writers more than artists, but I definitely always buy anything involving the artwork of Frazer Irving. Whether it's "The Simping Detective," "Fort: Prophet of the Unexplained," "Klarion, the Witch Boy," or "Silent War," Irving reinvents his style for each project, but somehow maintains the same wonderful level of quality.
So, yes, I'll be buying "Azrael: Death's Dark Knight" just for Irving's art.
I told him as much when I bumped into him at the New York Comic-Con last month, and we got talking about his work on "Klarion" and he said he owed his career in American comics to Grant Morrison because Morrison had to fight really hard to get DC to hire him for the four issue series about the Witch Boy. His style didn't look mainstream enough, apparently, and without Morrison standing his ground, we never would have gotten to see Irving's "Klarion" at all.
Oh, DC! If you can't appreciate the greatness that is Frazer Irving on your own, then maybe you should be publishing something other than comic books.