I run into the same problem when I go hiking. I like to be ready for pretty much anything that comes my way. I shoot a Pentax K-1 as my main camera.
The lenses I take with me are: 28-105 f/3.5-5.6, 100mm macro, 150-450, and a 1.7 TC.
About the only gap is 100-150 and I can always crop an image from 105mm if need be.
I have the 24-70 2.8 and the 70-200 f/2.8, but I've been using the above and it seems to work for me.
I also have an Olympus E-M5 mk II and the 14-45 and 45-150 lenses along with the 30mm macro. So I will occasionally take those instead of lugging the Pentax gear around.
Probably a Sigma 50-500. While it's not the sharpest lens around, it would be the most versatile.