Ok, all of these are in order

In-ring Performance

Sugar Ray Leonard
Pernell Whitaker
Roy Jones Jr
Marvin Hagler
Bernard Hopkins
James Toney
Joe Calzaghe
Antonio Tarver
Chris Eubank

Achievements

Roy Jones Jr
Sugar Ray Leonard
Bernard Hopkins
Pernell Whitaker
Marvin Hagler
Joe Calzaghe
James Toney
Antonio Tarver
Chris Eubank

Dominance

Marvin Hagler
Pernell Whitaker
Roy Jones Jr
Bernard Hopkins
Sugar Ray Leonard
Joe Calzaghe
James Toney
Antonio Tarver

Mainstream Appeal

Sugar Ray Leonard (& it's not even close here)
Marvin Hagler
Roy Jones Jr
Chris Eubank (only in UK)
Bernard Hopkins
Antonio Tarver
James Toney
Joe Calzaghe
Pernell Whitaker

On the last one, it's Leonard in a far out lead, followed by Hagler, who's closely followed by Jones than the rest are all a similar level.