I'm actually with Anoebis & Ormion on this one. We have shitloads of sunny uplifting melodically swirling morning(ish) goa but the "darker" side is a bit underrepresented. We'd need something close in atmosphere and sound to the likes of Hallucinogen - The Lone Deranger, most Psychaos, Slide, Cydonia, UX, Orichalcum, Process, later MFG etc to balance out the musical palette. Not that there's anything wrong with melodic morning goa, some of it seems to be even a bit too melodic at times
And there's not that much goa at bigger festivals, aside from Filteria ( unless I'm totally blind, which I might well be )
PortaMento is if not entirely dark, at least leaning towards the direction. The same with Morphic Resonance. Psy-H Project is a confusing hybrid of darkpsy basslines and goa melodies.