One can do a lot with a quality adjustable wrench.

Most pedals use 15mm wrenches, although some are close enough to a "standard" wrench that one can sometimes use one in a pinch.

There are several metric and standard wrenches that are close enough that one can frequently use either one.
13mm and 1/2" are very close.
3/4" and 19mm are also very close.
As mentioned, most pedals take 15mm, but I think I've used 9/16 to remove them in a pinch.

Also, as mentioned in another thread, many pedals can be removed with an Allen wrench.

Anyway, find a quality adjustable wrench (not those cheap China/Taiwan ones from 20 years ago). Either a good Made in the USA wrench, or perhaps a good quality newer one. Perhaps also get two, one for each side. Even Vice Grips can be handy in a pinch.

Evaluate what you'll likely need to be adjusting on the road. Cone Wrenches? Hub Bolts? Do you really need to remove pedals? Is your wrench narrow enough? Perhaps a multi-spoke wrench. Also throw in a chain tool, or a multi cycling tool including a chain tool. Brake and brake pad adjustments? Derailleur Cable adjustments?

I don't see any smaller wrenches in your list, 8,9,10,11mm? Again, a reason to have a good adjustable wrench.