I'm looking for a good taunt pokémon but I can't make up my mind between Gyarados or Gliscor. I know Gyarados is a popular choice but I'm wondering is Gliscor is as good.

I'm currently running Scizor, Rotom-W, Scrafty, and Aegislash but I'm going to remove 'slash. Anyone have experience using Gliscor or Gyarados? Which one would you recommend?