Yeah, but good luck bringing him in on a T-Tar. That thing can't take a Tackle without loosing about abazillion HP. It's the same with Dugtrio... he can massacre T-Tar, if played well, but he can't switch into anything. I've noticed Claydol does fairly well against him (used to bve the ultimate counter in Emerald), immune to Earthquake and resists Stone Edge. But Crunch and/or Dark Pulse puts a dent in him now.
In essence, the only way to beat T-Tar is to predict well, and know what variant it is. I would have to say, though, that the best counter for him these days is a Bronzong. Same as Claydol, but the Zong takes trivial damage from Crunch/Dark Pulse. Gyro Ball is risky against T-Tar, since he's amazingly slow as hell. But Earthquake is good, or if you can get one with HP[Fighting], it's even better. Although, you have to wonder if HP[Fighting] is worth going for ONLY to take on a T-Tar. Other walls that I've seen tend well against T-Tar are Donphan and Swampert. Basically, anything really bulky with a STAB Earthquake makes T-Tar break a sweat.
EDIT: Just for reference, this is with more of a stall team mentality. If you want an attacker, by all means use a Heracross or something. But make sure you can play it well, since T-Tar is nothing to fool around with.