Kava Supreme, Real Kava's Vanuatu, BKH MeloMelo (if the current batch is like the 1st batch), Stone and perhaps Fiji Fresh.
Then there are things like Nangol Noble, Fiji Fresh (depending on batch) and Real Kava's 5 Star kava that are quite heavy, but still retain some light uplifting euphoria. If you're willing to try Isa, those will typically always lean heavier than most.