Mapman, you are on target. Important things are higher mass playback setup, variable speed, 78 stylus, and even a cheap equalizer will do. Picking approriate gear is important, but matching for sytem synergies and balancing "PRaT" vs harmonic richness and all that other LP stuff is not on the table with these limited band width, high noise recordings.
A $30 Stanton 500 with a 78 stylus. But a passable flip-over ceramic can also yield acceptable results.
A 60s or 70s Dual, P-E, Lenco, Rek-O-Kut, Garrrd 4HF. A cheaper Garrard or an average 1960s changer (V-M, Collaro) will sound good on later 78s but lack varying pitch for the older ones and will have bit more rumble.
A mono blend. Blend at the interconnects if you don't have a switch.
Some kind of eq ability. A 10 band eq from an 80s "rack system" and you're good. But wide range tone controls are a help.
Going beyond that, you're dealing with significantly diminishing returns.
Accoustic era 78s (pre 1924 or so) have no eq (as one would expect). The majority of 78s you'll commonly encounter in the US from later periods use a 500 cycle turnover.
But the thing is, the frequency response was so ragged, and quality control and disc history so varying, that there's no reason to knock yourself out for the handful of records you may - or may not - have that use alternative eq curves.
That's not to say you wouldn't get a meaningful improvement with, say, a huge transcription deck like an RCA 70 series, long "transcription" tonearm, archival phono equalizer, and, most of all an array of custom styli. While you're at it, a single-ended amp and a single large horn speaker.
But that also requires spending more time selecting stylus and curves and preping each disc than listening to it. If you're doing serious digital transfers that's necessary. If you just want to listen once in a while to the crate or two of 78s you may have inherited or picked up at a grage sale, IMO it's silly.