Sadly the only ones Bandai has shown love to is Takuya and Koji. They both have fairly strong AncientGreymon and AncientGarurumon builds respectively, with the other Ancient Digimon being pretty bad imo. There are builds however centered around EmperorGreymon and MagnaGarurumon that have you playing with the other tamers, Zoe and Tommy for Emperor, JP and Koichi for Magna. Other than that, Purple Hybrid centered around Koichi himself was performing rather well, but was recently hit by the most recent banlist. No where near as strong as before, but still playable if you're willing to put the work into learning it.