Victreebell is much better than persian if with wrap legal, and wrap is the standard so that should be assumed.
Also rhydon and golem don't play as similarly as people think. Golem's draw is obviously explosion, rhydon's draw is that he's got a guaranteed 2HKO on chansey, and less importantly has a good chance of KOing slowbro in a rest loop if he comes in on the rest.
If you're using golem, you're looking to catch something with explosion. If you're using rhydon, you have the luxury of just paralysing chansey and then sending rhydon in on anything other than icebeam.