1. Lomachenko 2. Golovkin 3. Usyk 4. Crawford 5. Canelo They're my 5, I think depending on the person 2 to 4 can be interchangeable at will.
I do think there is a top tier of 8 guys that deserve more props for being "better" than everyone else for what they've achieved. Pick any 5, I guess... Rungvisai Lomachenko Inoue Usyk Alvarez Golovkin Crawford Mikey
Loma, Garcia, Inoue, Crawford, GGG Though I'm inclined to switch GGG for Usyk soon since GGG's getting up there with age, the Canelo 2 fight will be the telling factor. Also you can switch Inoue for Spence or Canelo.