Brad Daugherty was good, but he's probably overrated a bit. He was a pretty soft defender, and for his era, his rebounding was nothing special (only one season in the top-12 in rebounds per game). He was a solid passer and a pretty good scorer (although, again, never in the top-12). He also only made the playoffs five times.
He had a perfectly respectable career. He's not a starter in this league, though, and he's not really one of the top backups. I'd consider him more of a mid-range backup, on the same tier as Willis, Laimbeer and Sabonis and behind guys like Sampson, Issel, Cousins, and Sikma. Hell, if I had one playoff series to win and had to pick between Daugherty or Bogut at their peak, I'd probably take Bogut.