Keep in mind a decision like this (Ice Fang VS Dragon Claw) is simply up to personal choice and playstyle. They offer different strengths and have different weaknesses and it all comes down to the player decided which move to choose. There probably isn't a better choice in this case, which is fine because things would get boring fast if there was only one viable moveset.
Ability: Strong Jaw
Item: Life Orb
252 Att/252 Speed
Jolly
Rock Polish
Head Smash/Rock Slide
Ice Fang/ Thunder Fang/ Poison Fang/ Fire Fang/ Dragon Claw
Ice Fang/ Thunder Fang/ Poison Fang/ Fire Fang/ Dragon Claw
This guy actually has a great ton of options available to him. Whatever your team struggles with, this guy can pack the appropriate move.