10. Teri Garr
Multiple sclerosis has kept Teri Garr out of the spotlight for the last decade, but she was an underrated staple of Late Night, serving as a funny, flirty sparring partner to Dave. Their most memorable moment came in 1985 when Letterman coaxed her into taking a shower during the show. (She finally relented, but only after announcing, "I hate you!") Their banter displayed a palpable sexual chemistry, but in the 1990s they had a falling out after Dave was irked that she spoke to TV journalist Bill Carter for his late-night wars book The Late Shift. But they eventually buried the hatchet, and Garr came on the Late Show in 2008 after suffering from a brain aneurysm. After Dave helped her to the couch, the host slyly joked, "I enjoyed the opportunity to grab you inappropriately."