And I think it earlier work (like Hunt for the Red October and Patriot Games) isn't all that bad.
I'll agree that Clancy was a decent author at the beginning of his career. Beginning in the early 90's he started believing his own hype and the quality went down fast. At the same time he started to franchise his name, like you mentioned, and put his label on other people's glop. I'm rather sorry I read Teeth of the Tiger, HIS last book. It read like a bad wish-fulfillment fantasy full of plot, legal, and professionalism holes.
The Sten series, by Cole and Bunch. Protagonist guy is a professional terrorist / government agent, depending on how you look at it. Think militant CIA.
Richard Marcinko's Rogue Warrior series. This stuff reads reads like mediocre Clancy, but it's still about a small team of military infiltrators. I liked it as a teen, but my attempt to re-read it a few years back left me unpleasantly surprised. But the guy was a big name in the SEALs for years, apparently.