#8
That pretty much leaves Freeza, Vegeta, Cell, King Piccolo, Piccolo Jr, Beerus, and Buu. Tien also could have counted, but I'm guessing he isn't counted at this point.
Kinda disagree (or are confused) with them on a couple of points.
1. 16's influence: I agree he was definitely a good influence on them, but I disagree with the idea that he's the only reason 17, and 18 turned good. I'd say the main reason the future was so different with them is because there was nobody there to stop them. We see them pull off a few crimes in the present, and those crimes escalated as they didn't have to worry about anyone stopping them.
2. 18 Criticism: They talk badly about her being married and having a kid....then make a point about her being a badass mom. Isn't the problem if a character stops being badass after being a mom?