until multi-track was common in the mid-60s nobody cared about mix & master except the engineer, who would have been working with mic placement, and lathe cutting to mitigate these concerns. and that's about as far as they went in that regard in those days.
yet still they managed to make great records....without caring about mixing or mastering.
that's because it's a matter of arrangement, instrumentation and creativity to make a good main melody. mastering has nothing to do with it, and mixing has almost nothing to do with it.
or perhaps your question isn't being asked clearly...if it's just "the sound" or timbre you're referring to, then kill your presets and dial it in.
familiarity with process and technique takes years of practice and no "one answer" for all scenarios exists