No true 1-dimensional fighter has had too much success since the 90s. Since 2000, I'd say the most 1-dimension fighters to win belts are Lesnar and Poatan. Poatan is better in terms of grappling/TDD than Lesnar was at striking/BJJ, but he really hasn't been challenged by a good wrestler yet. If he'd been at LHW almost any other time since 2000, he'd have to face guys like prime Couture, Tito, Jon Jones, Bader, Phil Davis, Cormier, etc. Ank is a good, well-rounded fighter but his TD game isn't special at all.