IMO, Beast Mastery hunters are the most forgiving class to box in terms of mistakes and gear ilvl, especially with glyphed Misdirection and 2-second pet rez. That hasn't changed since the 6.0.2 patch, though I can only speculate about level 100 performance.

Also, ranged classes will generally be easier than melee due to movement and positioning issues, though ranged classes do tend to be notably more squishy than melee classes generally speaking.