Yeah, Onizuka gradually develops a student following along the way, and he gets help solving problems as the show goes along. By contrast, Kintaro solves most of his problems alone, until the last episode. But, considering that Goldenboy is only a six episode OVA, it makes more sense that way.
Despite their respective talents, both characters still rely quite a bit on improvisation and incredible luck. Compare that to a character such as Taichi in Master Keaton, who solves cases by being perfect at everything and twelve steps ahead of everyone else. Even James Bond, Angus MacGyver, and Indiana Jones rely on luck sometimes, but Taichi Keaton never does. lol