WASHINGTON - Dennis J. Kucinich for president? Carol Moseley-Braun? Al Sharpton? Howard Dean and Gary Hart, for that matter? On paper, anyway, none of these five presidential hopefuls stirs visions of Washington, Jefferson, Lincoln, FDR or even Bill Clinton. Yet each has either jumped into the race for the 2004 Democratic nomination or is poised on the brink - this political season's versions of Gary Bauer, Steve Forbes, Alan Keyes and all the other forgettables of previous presidential years.