Kyurem-B is really good, but not always good. Let's discuss Hydreigon! Don't emphasize on his new 4x fairy weakness as if it's unusable with it. Specs or Life Orb, Hydreigon is a powerful wallbreaker with its great mixed stats and great movepool. It's certainly better than Infernape! He can also run a Scarf and be a nice sweeper overall. I'd say Hydreigon for B rank. I tried one and it was OK. Another amazing BL with no rank is Gothitelle. Why should you ever use a Gothitelle with those type of stats? Shadow Tag and a small but perfect movepool. It can trap and destroy common walls and cores such as Venusaur, Heatran, Skarmory, Slowbro and more. It can Trick its Specs onto a pesky CroCune on the predicted Calm Mind and kill it with Psyshock. However, he can only defeat those pokemon and rarely puts up more work than that. That's why I rank Gothitelle B rank. Haxorus needs a mention too and even though I personally haven't used it, I've seen enough to explain my rank. Once a scary physical monster, we can safely say the fairies got to this dragon. There was a time when it could spam Outrage and destroy puppies, but now a Dedenne can stand in the way and... not Dazzling Gleam because it has no fairy STAB. He's easy to predict, revenge-kill, or just wall. Haxorus is C+ rank. Last but not least, the bamp luchador bird is coming to fight! But its not good in OU :( In UU, it could force switches with its great typing, Sword's Dance, activate Unburden and kill your family. In OU it can die to priority, be checked by the best and most common pokemon, and set up and not sweep. Hawlucha is C- rank.
Oooh! I forgot normal Venusaur. I can't rank it but you guys can discuss it.