None. Dragon Ball was, ultimately, the story of Goku's life; and that story came full circle with him flying off to train Oob. Alongside Goku's story, most of the other characters' story arcs such as Vegeta, Gohan, Piccolo and Kuririn were all complete and the narrator makes it abundantly clear in the manga that Goku's battles are over. There was absolutely no need to go further, and all attempts to continue on from either the Boo Arc or the end of Z's conclusion have proven to be poor ones.
If forced to choose one though, I'd go with GT since it at least had a few good ideas that gave it some sense of finality that was hampered by poor execution. Super's good idea to poor execution ratio is even worse than GT's, and Multiverse is the epitome of vapid, wish-fulfilment fan-fiction with some egregious retcons and some abysmal pacing at times.
Including choices not in the poll though, the lore from DBO takes it for allowing a continuation that doesn't tarnish the legacy of the original manga, expands the world building and is overall far more consistent than the other options.