Depends on the definition or criteria really. We don't have enough film of Greb, Ketchel or Zale. And Monzon, Hagler and Hopkins defended against mostly welterweights coming up in their big defenses. Thinking about it, Nunn, McCallum and Reggie Johnson takes some beating. All experienced world champions at the weight and all at their best at the time, two southpaws with 'lb4lb' skills and ability (if that's a thing) and the best body puncher ever/best 154lber ever in road warrior McCallum. And we have the footage and we see Toney is a throwback to Gans, Burley and Moore.
Depends who you ask. Accomplishments wise no but Eubank is clearly talking about h2h in which there is an easy argument that he gives the top 5 mws of all times fits and favored over some as well