I'd place him in the top 10....Top 5 is debatable. For me he isn't active enough to warrant such a high ranking.

Compare his heavyweight resume to other top heavies.

Haye: Barrett TKO5, Valuev MD12, Jawny KO9, Audley KO3, Bonin KO1

Pulev: Skelton KO4, Guinn UD8, Vidoz UD8, Rossy KO5, Walker UD12, Sprott KO9, Dimitrenko KO11

Povetkin: Ahunanya W6, Donald UD10, Byrd KO11, Chambers UD12, Estrada UD10, Chagaev UD12, Boswell KO8, Huck MD12

Adamek: Golota KO5, Estrada UD12, Arreola MD12, Grant UD12, Aguilera UD10, Chambers UD12

Helenius: Bidenko KO3, Brewster KO8, Tony KO6, Peter KO9, Liakhovich KO9, Chisora SD12

Chambers: Rossy KO7, Guinn UD10, Brock SD12, Peter MD10, Dimitrenko MD12, Rossy UD12