What fish do you think is the most disease resistant?

[Palster]

I have never had a Damsel fish in my tank but my Yellow Tang has been with me for years and has survived just about every mistake and tank disaster imaginable. This fish has been in three different tanks. I think one of the reasons this fish does so well is because the other fish are not able to bully this fish as it is able to look after itself and not get stressed.