I’ve done a bit more researching into the other species of the Bittersweet Nightshade Group (Dulcamaroid Clade). Found some interesting things. It seems most of the other species are sadly poisonous as well, however there is 1 species below has a risky edible part.
Lyreleaf Nightshade (Solanum lyratum)
PFAF says it has edible leaves if cooked (Pfaf also advises caution & so do I, ya don’t want to fuck around to find out 
). Berries may or may not be equally edible like S. dulcamara, but this species has at least medicinal uses that I haven’t investigated yet. Unlike S. dulcamara, it has white flowers with green spots, Red to Orange Stamens & Wooly/Pillose Hairy Stems.
There’s also a Purple-Leafed Varietent of Solanum lyratum
Brazilian Nightshade (Solanum seaforthianum)
It seems that this species is directly sister or closest to S. dulcamara. Most sources say it’s not edible, it might be on similar toxicty levels to S. dulcamara, but most studies on toxicity have been done with S. dulcamara. I was hoping some culture in the world had already domesticated a species from this group that I simply didn’t know about.
Chilean Potato-Vine (Solanum crispum)
Bro, why is every ornamental Solanaceae Vine called a Potato-Vine 
. We already have Lycianthes rantonnetii. Anyways this species also is not edible despite is closeness to S. dulcamara, altho this doesn’t look morphologically too similar with them skinny leaves. Not finding much excitement in the other Bittersweet Nightshades 
Anyways I found this HUGE Pdf on all the Species in this group. Sadly it also seems none are edible. I’m getting the feeling Solanum dulcamara is the best known species with the most extensive toxicity/Edibility Studies on it by comparison.
This study does a good job of Capturing the Diversity in this group, aparently Black & Peach-Pink fruited Bittersweet Nightshades also exist (all Not edible)!
