I'd struggle to fulfil the requirements of the question, particularly if you saw the number of tool boxes and socket sets I keep in my Land Rover, but then I can [censored] near repair anything roadside too.
OK, you need at least one shifter, probably a good all round size is a 250mm/10" and I only use Bahco. No other brand measures up IMO. Jaws are guaranteed both ways too.
Bugger, need a 6" one too.
Medium Phillips head screwdriver, medium crossblade screwdriver (Witte or equivalent) and a pair of multigrips.
That's five, but I can't do without a pair of pointy nose pliers, medium size linesman's pliers, side cutters, medium weight ball-pein hammer, etc.
Basically I'd carry a much bigger tool roll than you.