TV'S ALL-TIME FUNNIEST Lucy or Mrs. C? Kimmy Gibler or Cosmo Kramer? The Nielsen folks asked viewers to pick the funniest TV dads, moms, kids, relatives, neighbors, friends and bosses. The results are revealed here with clips and commentary from such stars as Marion Ross, Mary Tyler Moore and Brad Garrett. (N/CC) (2 hrs.) (7 p.m. Ch. 8)