Although sounding similar, Okuyasu and Kuwabara are voiced by different seiyuus: Wataru Takagi (Garrod Ran (Gundam X), Onizuka Eikichi (GTO)), and Shigeru Chiba (Buggy (One Piece), narrator (Hokuto no Ken TV anime)), respectively. As far as I know, they were not voiced by other seiyuus.
That's why I'm removing the seiyuu_connection tag.
Also, I suggest adding trait_connection, since both are portrayed as delinquent students with a soft side in their respective anime/manga.