I would choose Golovkin as of now - Ko's over Rosado , Ichida and Macklin.
Mikey Garcia is a runner up also - dominated Salido and ko'd JM Lopez.
Floyd may be there if he beats Alvarez convincingly; Alvarez likewise if he beats Mayweather
Garcia or Mathysse may both be contenders , considering who will win .
If Rigo has another big win this year , he could be considered
Adonis Stevenson also is a guy who had a big year. Kovalev also!!

anyone else who may be fighter of the year?

right now- Golovkin for me