Just saw Hunter x Hunter for the first time last night. I only watched the first two episodes, but I found the anime to be much more enjoyable than the manga (though maybe that was due to the translation that I read). I'll definitely try to watch more of the series.
Also, I don't know what recent Toonami line-ups were like, but the upcoming one seems really good - we've got DBZ, One Punch Man, Hunter x Hunter, Gundam, Naruto, and One Piece. No idea if this particular Gundam show is good or not (never seen a single episode of any Gundam shows), but I'll definitely try to watch Toonami more often given that schedule.
EDIT: Also, it sounded like Vaccine Man (the purple Piccolo-looking guy) is voiced by Christopher Sabat (who voices Piccolo), while Beast King (the lion) is voiced by Paul St. Peter (who voices Leomon in Digimon). Not sure if that's actually the case, but it's some nice references if true.