I always disagree with "youre wrong" then not really saying anything to back it up. but in general there often is a best, sometimes the best can be substantially above the worst. atm i dont see conditions to where bard isnt top dps (as they arent hurt by movement or range or switching targets or really anything as bad as others, all the while being supposedly top dps).

to the engineer, there is something my friends and i have dubbed "ep value". if a class does 90% the damage of the highest dps, but also does 50% the healing of the best healer, and the top dps is just providing dps, the 90/50 guy has more ep value. he is a bigger asset to the team on an overall point. technically he would be your best engineer. however OP asked who the top dps class was in the first post, so its who provides the highest numbers at this very specific job, the engineer thing is kinda irreverent then