Koontz was often overlooked when King cornered the market though he has come into his own since.. I do remember John Saul.
Another good one (actually series) was Repairman Jack by F Paul Wilson, probably ten to fifteen or so. One of the first was The Keep (also the movie). Wilson ranks very high on my list.
I think my second on list of favorite writers (after H P Lovecraft) would be the team of Douglas Preston and Lincoln Child; hero for most of their books is Special Agent Aloysius X.L. Pendergast From their collective pen the book and the movie Relic came, and about a dozen more novels (usually rather lengthy); they're still publishing.
If you've never read this team, you really should.
