300 wsm for everything. Would love to add to it but there is no need. Maybe one day just for the fun of multiple rifles.
I think we often over think the cartridge selection. Would you rather be punched in the head by Mike Tyson or kicked in the head by Anderson Silva?
Most of my hunting with a 300 wsm could easily be done with anything from 243 to 460 wby or something "too slow" like 8mm Mauser or 45-70.
Lately my bow has been chosen most when in the field.