I highly recommend Posford's "The Herb Garden" from Mystery of the Yeti Part 2 (released as a Hallucinogen track before he seemingly switched to doing all of his chiller music with Raja) - https://www.youtube.com/watch?v=9Nce44osPpE

Celtic Cross, Ott, and Entheogenic are phenomenal as well.

I'd recommend Third Ear Audio, Carbon Based Lifeforms, Kuba (specifically the album Through a Lens), Phutureprimitive, Saafi Brothers

If you're ever looking to put on a few hours of something and want an epic thematic journey spanning 2 albums, try "When the silence is..." by Koan - https://www.youtube.com/watch?v=IBksiW_3dCY

edit: I'm not sure what genre this fits under, but the album "Deliverance" by Culprate reminds me a lot of Shpongle in ways that it has no right to, since... I'm pretty sure it's not psychill/psytrance