You guys and your not-CB Golurk.
Golurk might not be able to switch into Giga Drain, but Eelektross can't switch in to Shadow Punch, Ice Punch, or Drain Punch. If it does, it gets outrun and KO'd by the same move. If it switches, something else gets to eat a powerful attack.
It also has a bunch of weaknesses such as Carracosta and Haunter, which can take hits and outspeed respectively.
It'd have to be a revenge kill for Haunter, since it certainly can't switch in to Shadow Punch or Ice Punch. (And in the unlikely circumstance that Golurk has full HP, Golurk wins!) Only the bulkiest Carracosta can survive an Earthquake, and they have to use Waterfall+Aqua Jet to KO back. You can probably switch in something to take the uninvested 40 BP water move, having just crippled one of their tanks.
Expert Belt Golurk is nothing to sneeze at, either. It's hilarious to pretend to lock yourself into Earthquake, and then...
252+ Atk Expert Belt Iron Fist Golurk Shadow Punch vs. 4 HP / 0 Def Haunter: 562-662 (242.24 - 285.34%) -- guaranteed OHKO
...on the switch. If you can predict well, CB Golurk has some of the best mindgames in the business. With three immunities, plus each of his STABs having an immunity, your opponent has to guess what you're going to do. If they guess perfectly, maybe they don't take a hit. Maybe they take a neutral hit. Maybe they switch their Musharna out for Zangoose to take the Shadow Punch, then get clobbered by Drain Punch and you keep on rolling. Or you guess wrong and you're trying to break Musharna with Drain Punch. You just gotta believe, mang.