Dean Koontz
Laurell K Hamilton (or at least I used to, the last couple I have read, but copies at the library...I keep hoping to be pleasantly surprised)
Sidney Sheldon (he doesn't come out with new ones anymore, but I have every copy of his books)
Michael Crichton
Vicki Pettersson (granted, she only has 3 books out, but after reading her debut novel, I am hooked!)
Agatha Christie (I want to read/own all her novels, but only have a few)
Shakespeare (I have about 1/3 of his works, want them all too)
Preston/Childs
Larry McMurtry (not a big western fan, but love the Lonesome Dove series)
Kelley Armstrong
.....there are probably more, but I can't think of any. Fighting a bad head/chest cold right now and I am feeling kinda loopy....