There is an RS21 rear very cheap on
ebay, rim brakes only of course.
" If you need a bombproof, affordable wheelset for daily riding, commuting, or winter training that won't break the bank and offers dependable performance, the Shimano RS21 is an excellent choice, often recommended as a big upgrade from stock wheels. "
I bought a spare spoke but never needed it. Also a 200lb plus reddit rider likes his, corresponding to my observation, that being 'likely will never needs truing'. I used to carry the spare spoke but after much heavy touring, them staying 100% true upped my confidence.
As an aside, my ebike wheels stay true so maybe, via neccessity, they also get good build attention at the factory.