Who agrees that the following characters aren't remembered in the series after the saiyan, Namek, and Frieza Sagas respectively (Not counting GT)?
Considering all of those characters either died like cowards or didn't speak what did you expect? Still, this happens all the time when a writer doesn't feel like writing about a character anymore. Another good example for Dragonball would be Arale. We know she's still there just Toriyama doesn't feel like writing about her anymore.
I love Baba's fighters, Monster Carrot was awesome, I wish they'd done more with Pikkon, and I wish Roshi hadn't ended up little more than occasional comedy relief in everything except World's Strongest in DBZ (which I suppose isn't even canon) but I think the one human that could've kept up with the Saiyans to some extent (assuming he is human) and grew almost as rapidly as them without any Zenkai Boost until they decided to forget him was Tien. He's shown now and then and has a herioc, yet pathetic power-wise comparatively, moment against Cell. Besides that, he's pretty much no there after the Saiyan saga.
@flashback180:Not just appearance, but mention too. They didn't even appear in flashbacks, whereas frieza and cell did, in flashbacks, even though they were both dead and have been mentioned loads of other times. The ginyu force was shown in the buu saga watching goku vs kid buu, along with other villians (among whom the aforementioned ones do not appear).
Well Toriyama tends to forget about his older characters some times.
And wasn't the entire thing a filler ?, I don't remember seeing Gynue force in the manga after they were killed. I don't think they even showed anyone in hell in buu saga. The only thing i can remember is King Yama cheering Goku when shooting the sprite bomb.
Besides characters like Cui were minor characters who was weaker than Vegeta ,IMO Cui is equal to wolf that fought yamcha in DB.
Saibamen are a entire another story they were shown as a race so they didn't have individual names with personalities . But if you count in the non canon fillers they have made multiple appearance .