If I were to make for myself a top 5 I would say I think this:
3) Android 21
5) Majin Ozotto
Let's tart with my long time favourite (check my Avatar ID lol) So what I love about Hatchiyack ? It's how cool charadesign wise he is, also love the backstory of the character with the Hatred machine and the orb spirit who summon ghost warrior. The concept behind this character and how its tie to the Saiyan taking over Plant/Vegeta during their war against the Tsuful makes for an interesting concept. I love also his many forms. If they were to remake dragon ball from the get go they should tie his creation with the Bebi Tsuful
Here I had to choose between Shallot and Kanba and the choice was hard to makes they are close. So what I love about Kanba ? I know we know nothing about his backstory yet ! But I like how he seems near unstoppable for now, also he reeks badassness (mostly because of his seiyu) as hell more than Broly and I like this Hannibal Lecter vibe they got to him. Can't wait to see more and know more about him.
My only woman in this top 5 so what I love about Android 21 ? It's how they connected her story close to Gero and mostly close to Android 16 which tie with Gero and of course Android 21 son, my bet is that Gero's and Android 21's son was killed during Goku's rampagne on the Red Ribbon Headquarter. Design wise she cool and stunning clearly pure fan service I admit and outclass Towa kilometers away.
About Fu being the son of Towa and Mira makes him intersting he has the power of his father and the brain of his mother which make him more than a threat BUT he is not that evil, he just do what he wants either it is bad or good kinda like a Trickster making him kinda the Loki of the Dragon Ball Franchise. And since I love Loki
Finally Majin Ozotto, well it's a Majin but him being a Majin I want to know how this guy tie with Majin Buu are they from the same race and if yes what are their backstory so much mysteries. Design wise I think he looks awesome love the horns and his three eyes kind of which he can be tie with Tenshinhan backstory too lol also this guy can Shapeshift making him a trickster too but more in a Shang Tsung departmemnt without the your soul is mine of course lol.
So here is my top 5 of choice. I think I wouldn't mind more inclusion of video games exclusive characters as long as they make more women into the Lore not because I support any SJW agenda or something. But because I strongly think the franchise lack women. Just check the wikia characters list for both gender and you will see how alarming it is. Also it will help myself for my own story project.