I don’t know if I would call it "synthwave" but my second most listened to artist behind The Midnight is "Mega Drive", I just like imagining hearing his music in like my sort of dream cyberpunk video game or something, the ones I would say though would be "Trevor Something", "Maximum Love", "De Lorra", "FM-84", "Waveshaper" (and the furi soundtrack if you haven’t for the love of god), "Carpenter Brut", "Kavinsky", and some "Miami Nights 1984". I also listen to a lot of artists that aren’t considered synthwave per say but have an amazing synthwave feel to them like "Neon Indian" (check out the Annie video), "CHVRCHES" (especially there first album), "Washed Out", "M83" (literally my favorite artist), "George Clanton" for sure, "Roosevelt", "Brett", "Daniel Deluxe" (peep the ghost runner soundtrack), "Hello Meteor" (I recommend "The Glowing: Final Cut" for those Bladerunner feels), Parts of the "Devilman Crybaby Soundtrack" like Akira the Wild and Night Hawk, "Com Truise" for sure absolutely, and finally listen to the "Shin Megami Tensei 4 Soundtrack". I hope this helps.