Manuel Charr. His KO losses to Povetkin and Briedis were among the most beautiful knockouts of the last decade
Beterbiev but he's too inactive. And Babic, who isn't highly skilled but is all-action. Povetkin and Dubois. Also Gassiev, Joe Smith, Lopez, Inoye and Spence. Kovalev and Golovkin used to be, but they're faded now.
Beterbiev, Inoue, Spence, Golovkin, Virgil Ortiz.And one not so popular, but for me he should be at that list - Israel Madrimov.