Skinomi Tech Skin
Last but not least is another excellent option for the LG G4 made by Skinomi. And while this isn't a glass screen guard, and instead is a skin like some cheaper options, it's still very capable of protecting that big 5.5-inch screen.
Skinomi offers this as an upgrade from cheaper film covers. They promise it won't discolor like some cheaper options found at Best Buy or carrier stores in 3-packs, has a stronger build material resistant to scratches, and features a glass-like feel to keep the screen naturual to the stock design. They even offer a full-body skin for those who want complete protection.
If you don't want a glass screen protector, this is probably one of the best film covers available.