Not my top 30, but here are the boxrec rankings. Any one of them would study tapes, train, and school Kimbo.
1 Wladimir Klitschko 1281 52 (46) - 3 (3) - 0
1996 32 orthodox Kiev, Ukraine
2 Vitali Klitschko 1248 36 (35) - 2 (2) - 0
1996 37 orthodox Los Angeles, California, United States
3 Ruslan Chagaev 873 25 (17) - 0 (0) - 1
1997 30 southpaw Hamburg, Germany
4 David Haye 710 22 (21) - 1 (1) - 0
2002 28 orthodox London, United Kingdom
5 Nikolay Valuev 654 50 (34) - 1 (0) - 0
1993 35 orthodox Saint Petersburg, Russia
6 Juan Carlos Gomez 638 44 (35) - 1 (1) - 0
1995 35 southpaw Hamburg, Germany
7 Samuel Peter 606 30 (23) - 2 (1) - 0
2001 28 orthodox Las Vegas, Nevada, United States
8 Alexander Povetkin 594 16 (12) - 0 (0) - 0
2005 29 orthodox Moscow, Russia
9 John Ruiz 509 43 (29) - 8 (1) - 1
1992 37 orthodox Chelsea, Massachusetts, United States
10 Alexander Dimitrenko 496 29 (19) - 0 (0) - 0
2001 26 orthodox Hamburg, Hamburg, Germany
11 Tony Thompson 471 31 (19) - 2 (1) - 0
2000 37 southpaw Washington, District of Columbia, United States
12 Oleg Maskaev 440 36 (27) - 6 (6) - 0
1993 40 orthodox West Sacramento, California, United States
13 Taras Bidenko 416 26 (12) - 2 (1) - 0
2000 29 orthodox Hamburg, Germany
14 Lamon Brewster 406 35 (30) - 4 (1) - 0
1996 35 orthodox Vero Beach, Florida, United States
15 Chris Arreola 398 26 (23) - 0 (0) - 0
2003 28 orthodox Riverside, California, United States
16 Albert Sosnowski 371 44 (27) - 2 (1) - 0
1998 30 orthodox Brentwood, Essex, United Kingdom
17 Martin Rogan 359 12 (6) - 0 (0) - 0
2004 37 orthodox Belfast, Northern Ireland, United Kingdom
18 Hasim Rahman 351 45 (36) - 7 (5) - 2
1994 36 orthodox Baltimore, Maryland, United States
19 Vladimir Virchis 348 24 (20) - 2 (0) - 0
1999 35 orthodox Kiev, Ukraine
20 Eddie Chambers 344 33 (18) - 1 (0) - 0
2000 26 orthodox Philadelphia, Pennsylvania, United States
21 Ray Austin 343 27 (17) - 4 (2) - 4
1998 38 orthodox Cleveland, Ohio, United States
22 Oleg Platov 331 27 (22) - 1 (0) - 0
2001 25 orthodox Hamburg, Germany
23 Kevin Johnson 313 21 (8) - 0 (0) - 1
2003 29 orthodox Atlanta, Georgia, United States
24 Chazz Witherspoon 310 24 (16) - 1 (0) - 0
2004 27 orthodox Paulsboro, New Jersey, United States
25 Monte Barrett 305 34 (20) - 7 (4) - 0
1996 37 orthodox Queens, New York, United States
name points W-L-D last 6 debut age stance residence
26 Evander Holyfield 304 42 (27) - 10 (2) - 2
1984 46 orthodox Atlanta, Georgia, United States
27 Sinan Samil Sam 298 31 (16) - 4 (0) - 0
2000 34 orthodox Hamburg, Germany
28 Cedric Boswell 296 28 (22) - 1 (1) - 0
1994 39 orthodox Atlanta, Georgia, United States
29 Michael Grant 294 45 (33) - 3 (3) - 0
1994 36 orthodox Blue Bell, Pennsylvania, United States
30 James Toney 291 71 (43) - 6 (0) - 3
1988 40 orthodox Sherman Oaks, California, United States