The Purifier of the Hallowed Doctrine from Heroes of Horror has a fun 5th level class feature.
Turn Tainted.
Essentially, as long as a creature has a Corruption/Depravity score of at least 1, you may count it as if it were an Undead creature with +4 Turn Resistance for the purposes of Turning.
If you have levels in this class, you are probably playing in a campaign where the Taint rules are used. It is really easy to get a Taint score, or, rather, to give it to someone else.
On the same page as one of the prerequisite feats, Pure Soul (page 124, a nice little feat granting you immunity to Taint) is Touch of Taint. If you have any natural weapon that inflicts ability damage (it explicitly calls out poison as counting), it adds inflicting a single point of either Depravity or Corruption with that attack.
In other words, you can now turn practically anything. And by practically, I mean "if you can possibly hit it with a natural attack. Yeah. Trivial."
I seem to remember some wording somewhere stating that anything that worked for Turning worked for Rebuking...
Get a way to rebuke a creature, and, iirc, you can command anything not explicitly immune.
I gotta go find that reference now...