3. Dustin Poirier
It's only fitting that the next man on this list of the best boxers in the UFC has wins over the previous two fighters. Dustin "the Diamond" Poirier's boxing is a thing of beauty - combining the power of McGregor with the volume punching of Holloway.
Poirier has collected 8 knockouts during his UFC tenure - all coming from punches. Those include wins over Conor McGregor, Justin Gaethje, and Eddie Alvarez. In fact, his 8 KO/TKO victories are a UFC lightweight record (tied with Drew Dober).
Poirier's boxing is so adept that he was able to become the first fighter to knock out Conor McGregor during their rematch at UFC 257 in January, 2021. He has a similar snowball-effect pressure style to Holloway, but with the added benefit of having true knockout power.
Poirier has an ability to stalk his opponent and string to together series of devastating punch combinations. Although he is a well-rounded fighter with great BJJ skills and solid leg kicks, he is more regarded for his boxing ability.
One of the reasons why Poirier is a fan favorite is because of how likable he is. During an appearance on the MMA Hour, Poirier stated "I'm on that list [of best UFC boxers]. I can't say [I'm the best]. I'm not that guy. I can box."