There's got to be better Pokemon to take advantage of this type combination, but Ursaring was the first that came to mind that can abuse Fairy and Ground. Guts and Quick Feet are both good abilities, though +1 55 Speed is still not very fast. The combination is resisted by Levitators or Flying-types that resist Fairy, so Fire Punch or another coverage move can help with that.
Fully evolved Pokemon that learn Play Rough + Earthquake: Donphan, Granbull, Smeargle, Ursaring
Fully evolved Pokemon that learn Moonblast + Earth Power: Lunatone, Smeargle
Fully evolved Pokemon that learn Dazzling Gleam + Earth Power: Celebi, Claydol, Mew, Probopass, Shaymin, Smeargle
Offensive CM Mew or Celebi could be cool with that type combo, but I don't really think anything else can make good use of the combo that hasn't already been mentioned.