I would look at top PKpH and PKW for each individual class, and then treat good and non-good as separate categories. Some classes and alignments lend themselves to more PKpH and PKW and tend to dominate the overall rankings.
Among good-aligned characters:
Assassin: Jycenna (nepenthe?) for both PKW and PKpH
Bard: Malthalia (?) for both PKW and PKpH
Conjurer: Clahier (?) for PKW and Jeqo for PKpH
Healer: Shura (shaapa) for both PKW and PKpH
Invoker: Rhone (?) for both PKW and PKpH
Paladin: Niheriva (Jalim) for PKW and Kemrin (?) for PKpH
Ranger: Azhelak (?) for PKW and Makiki (?) for PKpH
Shaman: Merrol (?) for both PKW and PKpH
Shapeshifter: Oshui (lightmage?) for both PKW and PKpH
Thief: Ageryn (Isildur) for PKW and virtual tie between Brinton (Jalim) and Mochodin (?) for PKpH
Transmuter: Macha (?) for PKW or Wujin (?) for PKpH
Warrior: Humbert (starbright) for PKW and Vozmuir (?) for PKpH
Jycenna was most probably Nepenthe
Clahier was habbs
Kemrin was jalim
Azhelak was Rhyaldrin
Makiki was ibuki
Merrol was Akresius (IMM-played)
Mochodin was Twist
Wujin was me, but it doesn't count because I didn't PK at hero. Probably would have still topped PKpH if I focused only on getting PKs at hero (restricting logins during low player counts).
Vozmuir was Magus