Hopkins . Hopkins was intimidated by fighters his own size that he couldnt intimidate and couldnt win those fights, ie Jones, Taylor, Calzaghe, Pascal
Bobby Chacon Roberto Duran Fernando Vargas unfortunately that was his downfall Manny Pacquiao Johnny Tapia Marvin Hagler when pressed into a shoot out (except for the Duran fight) Evander Holyfileld Joe Fraizer Frank Fletcher Erik Morales Prime Barrera Antonio Margarito Jeff Fenech Rafa marquez Michael Carbajal Tony Ayala Bazooka Limon Yori Boy Campas Kaosai Galaxy Iran Barkley Yaqui Lopes Saad Muhamad Emanuel Burton Zack Padilla Diego Corrales Dwight Qawi Fiire plug was scared o no one. Danny Lopes takes a liciking , put no matter whet you did to him he knew hed lower the boom on you eventually. Motivated Bert Cooper Gerald Mccellan Prime Ray Mercer Joe Hipp Izzy vasquez great warrior and made up for quitiing in the first fight.. but he shoed he cared about injuriees on that night. Ps i think a prime Hopkins fits your criteria, but the old one isnt so wiling to tae chhnces .
FLOYD !!! Not one great fighter capable of doing like him... fighting mamas and security guards......
Holyfield is a good one, I also nominate Jermain Taylor, he literally took on anyone, anytime, and the case could be made that it was his downfall.