Joe Hill, Koontz, Justin Cronin.
Neil Gaiman. I think I would recommend "Neverwhere" as a starting point. If you like a little darker, then "American Gods". Or if you want satire "Good Omens", which is co-written by Terry Pratchett. I also can't say more good things about his YA book "The Graveyard Book."
For light-hearted comedies try John Steinbeck's books. NOT! :laugh: There's just too many good authors out there to list all of them- Koontz (as long as they don't have golden retrievers with supernatural powers), Joe Lansdale, Robert McCammon, Dan Simmons, Joe Hill, Tabitha King, Scott Smith, the list goes on and on........
John Kennedy Toole
... the list will be too long by the time I'm through. There are so many excellent authors and so little time in which to read them all.
I concur with all the fine authors already suggested and also add Tess Gerritsen to the list.