Persian with Taunt isn't a good idea if you ask me. Regirock sometimes wields a Rocky Helmet, making Fake Out a poor choice as it does not do much damage. Furthermore, the rock golem does not care about Taunt, considering it simply OHKO's Persian with Drain Punch.
Speaking of golems, Golem is in the same boat as it can OHKO with STAB Earthquake.
This also goes for Golurk and Piloswine as well.