I haven't used a screen protector with my S7 Edge/S8+/S10 because I've always had a case like this that covers the screen:
Although this one for my S10 is a bit thicker than I'd like so I've ordered a Skinomi protector set and am gonna try that and decide what I wanna do. I put a screen protector on my Kindle Fire from Skinomi and think they have a pretty good product. Some people may not like the "soft" type feel of their protectors but it doesn't bother me (it's not like a glass surface).
I kinda hope the Skinomi works well cause I'd rather go without the big case I've gone with for years. The phones are so nice looking it's a shame you gotta cover the goddamn things up with a case for the one or two times in its lifetime you drop them and crack the screen or something.