Beyond Meat's ground beef and chicken strips are the closest I've had to "I had no idea" meat alternatives, but even though the flavor is pretty much spot-on, the texture is always just a little bit wrong. It's a very tricky problem, and I'm inclined to say that it's a better idea to sell things as "not meat, but delicious in their own right" instead. See, for example, Chipotle's sofritas - which are the most heavily seasoned / arguably most flavorful protein on the menu.