Magmortar

With excellent offensive stats and a decent movepool, Magmortar can be a huge threat in UU. However, it's cursed with being a Fire-type, thus losing 25% of its health to Stealth Rock upon switching in. Magmortar's Speed is also only average, leaving it vulnerable to faster sweepers, provided that they can switch in safely. What sets Magmortar apart from other Fire-types like Blaziken and Typhlosion is its access to Thunderbolt, which gives it an easier time against bulky Water-types like Slowbro. As long as one can get around Magmortar's weaknesses, it makes an effective sweeper.