I've been giving Arbok a try and he's pretty awesome! Intimidate is like a free coil pretty much against physical attackers (like a Sawk trapped in CC) and Gunk Shot has an awesome amount of power, Earthquake provides nice coverage and Sucker Punch rounds it out with Priority and a Dark Type attack to boot against psychics. 80 base speed is solid enough for this tier and he's able to absorb Toxic Spikes. I've been impressed so far and he can take down a good amount of pokemon.