[build a team] Need help with doubles !!

[Gold]

For double battles its really nice to have Pokémon that know moves that hits everybody and Pokémon that know moves that make them (semi)invulnerable while you are using said moves.
I know I used Heatran for quite some time (with lava-plume and earth-power or whatever the move is called), but I can't remember anybody else who was on my doubles team.