I've been using the same cheap Amazon case for over a year now; my S7 has survived multiple drops on asphalt and even a ceiling height drop onto tile.

https://www.amazon.com/Samsung-Galaxy-Diztronic-Flexible-Slim-Fit/dp/B01BDWIOJW

• Tudia Ultra Slim Full-Matte ARCH TPU Bumper Protective
• Diztronic Full Matte TPU Series - Slim-Fit Soft Touch Flexible Phone Case

I've been using this case with my Samsung Galaxy S7 since it was released and it's been great. It's thin and feels nice to hold. However, I'm not sure if they have a case like this for the S7 Edge so I'm not sure if this is very useful lol.