All the usual suspects make S8 cases, including slim and clear. I imagine S7 edge and note 7 owners might have some tips on how delicate the curved edges have been.
Let's face it all the real drop cases rated for like six feet are not super slim (seidio dilex vs thin surface, otter box defender vs thinner commuter, lifeproof). If what I want is basically a clear shell that only really scratch protects and holds a shatter together, basically just skin the S8 in ghost armor and enjoy a phone in invisible clothes. Make sure you keep your accident protection, while it costs more.
In other words, I don't think cases are a reason to pick a G6, even though I don't like the curved screen.
It'll be interesting to see more phones like the drop proof moto.