Where to begin... Could you maybe post some of your favorite tracks or parts? Then I can recommend you tracks in a similar style.
A lot of decent labels and subdivisions were mentioned here. I usually see these big subdivisions in the genre. I put my biggest recommendations in the beginning of the sum up. I think your taste in Forestdelic Records resembles the "abstract" sum up the most. I also posted my dj sets here in case you want to hear a lot of recommendations at once.
A) Oldskool Forest / Melodic Forest: Schlabbaduerst Rekkords (check out their Bandcamp and also the Bandcamp of the individual artists like BOTFB, Ka-Sol and Zoon), Chronicle of Mystery Records, Kiriyama, Kluster.
B ) Sanaton style "mossy" Forest (I'm using Sanaton in the name here because they were the first label that I listened to that was releasing this style): all the Hallucinogenic Horses Artists (Derango, Traskel, Makadam etc...), Attoya, The Cure Records / Medulla Oblongata Records, Flipkompagniet Records (Smuds, Volapyk, Orhm), Treetrolla Records, Mighty Quinn Records (latest VA!!), Shivattva, Oneiromanix, Digital Shiva Power Records, Vantara Vichitra Records...
C) More "abstract" Forest that leans closer to Dark Psy: Parvati Records (a lot of variety here, all quality, my fav release is Arjuna - Primal Contact), Farebi Jalebi, Phreex Networx, Lost Theory Records (also a lot of variety and some "Sanaton" style too), Sonic Loom Records. A lot of Japanese artists in this style too like Gu, Jangaramongara, Shiibashunsuke...
D) And then there's this label that releases a very distinct and unique style that I can't put anywhere else: Yggdrasil Records!! Loke / Hutti Heitta / Freeform Syndicate + almost everything else released on there.