Not really a good way to compare. I played a TKM in SWG and I'm playing a brawler (working toward monk) in EQ2.
The two combat systems are so different it doesn't really match against each other...
If you mean "as good as" by saying can they take on any mob in the game solo and tear it to shreads, then no... but then no class in EQ2 can do that.
But yes, they are a very viable and fun class with plenty of power and viability. :)