Duncan Hunter, I'm tellin' ya! So far no dirt, and solidly conservative on all issues.
DH has been in a gerrymandered district, and hasn't ever had big league political opposition to dig up stuff. DH was involved in the House bank check writing brouhaha. DH remains largely unvetted, which represents a risk to his candiancy, not an advantage.
DH to his credit has been married only once, but curiously, we never see his wife. The candidate's wife can be a significant asset.
So DH is relatively neutral as regards ethics, etc. No glaring problems, but neither proven free taint free. Married but once, but no use of wife to burnish his appeal.