I use a Fuji XT3 with an 8-16 f2.8 and 16-60 f4 and 23 f1.4 primarily for exploring. Then 80mm macro and 70-300. I then have several vintage lenses with adaptors.
I've still got my old Canon EOS700D, mainly use the 10-
18mm wide angle or my 50mm. Its getting a bit outdated, but still does the job. Also have a few others if something is a bit further away.
Canon 80d with a array of prime lenses. I do use a 10-18mm too but I find the prime lenses really enjoyable to use, especially my 24mm. Nice and sharp too and actually surprisingly usable even in the small spaces we often find ourselves in.
I use a D3200 with a Sigma 10-20mm lens. Not idea if its the best but they are cheap enough that its not the end of the world if it gets smashed up underground