If you're passing speed boosts onto it, sure. If you're running a scarf set, sure.
Point is, you can make it work, but as far as viable goes, if you define it as a set that can work in a competitive environment and still net you results, then yes.
If you mean result in optimum results, then probably not. If you just want a competitive shiny Goodra, yes you can get away with Timid. --- "Religion keeps pressing B when we try to evolve." - pirategeorge" [3DS FC: 1934-0673-9848 (Pentao)]