This is really up for debate and you'll get a ton of different answers, most of them anecdotal. Fighters aren't really built for massive DPS, but they can crank it out if specc'ed right. For example, as a shadowknight specc'ed for DPS, I tend to be consistently in the top 8 to 10 on our raids and occasionally top 5, losing to some scouts and beating out others. It fluctuates. The bottom line is that a dedicated, DPS specc'ed scout will always be able to out-DPS any fighter. High DPS fighters include SKs, monks and bruisers, and arguably 'zerkers. None of them are considered "tier 1" DPS. If you want to be a tier 1 DPS'er you need to roll with a predator scout (ranger, assassin) or a nuking mage (wiz, warlock, etc.). That said, if you really like the idea of a fighter or tanking, the DPS that the fighters I mentioned put out is still respectable.