Most of my earliest record were Szell and Cleveland. $2.75 each at the Michigan Student union in Ann Arbor. I imbibed the Beethoven PCs, Symphonies , most of the great Richard Strauss works, the great Dvorak Symphonies. I never cared much for his Brahms, though.
Kna? those slow tempos always kind of stopped me at the gate, but some of his Wagner is pretty transcendent. Hitler is reputed to have detested Kina so that is a recommendation of sorts.
Boulez and Maazel were great Conductors, well represented in my collection. Since all their work is from the stereo era, and they haven't been passed that long, they don't seem to be historical figures to me, but depending on where someone is on the generational scale, they may appear to be Historical.