Ryujin
Legend
I would add in S-Mart from the Evil Dead franchise, just for that big box store option. "Shop smart. Shop S-Mart."Other worthy inclusions as corporate rivals for the fightin' scientists of Tesladyne: Buy'n'Large (the movie WALL-E), Buy More (the TV series Chuck), Spacer's Choice (from the video game Outer Worlds, "It's not the best chooooice, it's Spacer's Choice!")...
Actually, there are a few great wacky evil corporations in the Outer Worlds, with ridiculously catchy jingles. Rizzo's ("Whoa! Whoa! Whoa! It's Rizzo's!") came immediately to mind, as did Autni Cleo's.