hey there plinkplinkplink,
Sorry...I may be the proverbial "day late and dollar short" (make that about a year late, and way more than a buck lower than i'd like in my bank account ha ha) but I'd like to take a shot at giving you some sound advice about jazz voicings. I have a bachelors of music in Jazz studies (not that you asked for credentials) and more than 10 solid years of experience playing in jazz, funk, rock and pop settings.
I most certainly agree with you. Pianostreet seems to be overwhelmingly inhabited by the so called "legit" piano community (

that's what we jazzers call classically trained pianists...no offense intended

). I thank that I can help you a bit with the jazz voicing question. All the folks here are very knowledgeable about piano repertoire, technique, and so on, they just haven't made it their business to research and digest the materials out there available to the aspiring jazz artist. I can at least give several book titles that I have found to be very solid for developing some voicing concepts.
1) The Jazz Piano Book - Mark Levine - Sher Music Publishing (great catch all modern jazz piano reference)
2) Voicings for Jazz Keyboard - Frank Mantooth - Hal Leonard Press (fairly thin book dedicated to a fairly narrow family of "hip sounding" modern jazz voicings i.e. quartal harmony)
3) Jazz Piano Harmony - Bill Dobbins - Advance Music Publishing (a bit heady for the casual player)
If you need more....navigate to:
https://www.jazzbooks.com/There is a link on the left side navigation bar for piano related books,
and then a section on specifically voicing related texts available on the site.
Happy hunting!
I would be happy to elaborate on some personal knowledge of the subject, if you have any questions, but these are good places to start. Knowing all the triads and inversions in basic diatonic harmony first, followed by all the basic 7th chord types (Maj7,7, min7, dim 7 min7b5 -again, with inversions) is a starting point. Most of the players we hear on records we listen to use different voicings than these. That is where the books come in. for cool chilled out Rhodes /Wurlitzer stuff, I think sus chords, min 7ths 9ths, 13ths etc really light up the room. You can investigate all of the extentions after you digest the basic 7th sounds...and we havent even talked about closed vs. open position, etc. Chordal harmony can be a pretty deep subject, to be sure. I wish you all the best in your search.
humbly,
Craig Morrison