I am one of the (many) folks who view Frazetta's and Wrightson's works as holy, sacrosanct. Indeed, Wrightson's own regard for Frazetta -- see the Painting with Fire docu for some sweet quotes -- is heartwarming.
Both had technical skills up the wazoo, but a new hot thang artist wouldn't be able to match either via sheer technical merits alone. The toughest department would be imbuing S o u l... that elusive x-factor. Frazetta's sense of soul, of vitality, is off the charts in even his barest sketches. And even Bernie's most undead of undead characters had an infinite pathos.
I can ramble on, but you get my drift.