Ace Horror, Jim McLaughlin is given credit as the artist who had the most stories in the Ace horror comics. These two stories by McLaughlin, who had a fairly straightforward illustrative style, are from The Beyond #15 (1952) and Baffling Mysteries #10 (1952) respectively.
In scanning both stories something that struck me is the moody coloring. The story, “Diogenes’ Deadly Lamp” does not have any panels colored in traditional style, although “Don’t Wake the Dead” is a bit more traditional. In both stories the coloring adds an aura of eerie mystery and dread.