Space Wolves have Thunderwolf Cavalry (still a nasty unit with a hard punch and solid survivability), a Dreadnought with 3+ inv. save to its front arc and two S10 weapons, a Dreadnought with a load of attacks at S7/S8, two very capable flyers that are also transports (and Assault Vehicles, IIRC), plenty of items for characters and all. Throw in the Great Company supplement and they become nastier.