Here's my favorite Jazz Pianists (el piano included). Couldn't offer you an "other" option as I needed all 25 poll choices for myself. But if you have an other, please do tell me.
If you know very few of these I envy you all those hundreds of hours with fantastic music you now can look forward to discover. Reccomended listening (some titles are with other main artists/bands/ensembles, but google will figure it out for you):
Mal Waldron
Up Popped the Devil, First Encounter, Black Glory, Free at Last, The Call, Number Nineteen, The Quest, The Whirling Dervish
Andrew Hill
Compulsion!!!!, One for One, Judgment!, Point of Departure, Dialogue, Passing Ships, Black Fire, Blue Black
Herbie Hancock
Inventions & Dimensions, Empyrean Isles, Crossings, The Jewel in the Lotus, Search for the New Land, Oblique
McCoy Tyner
Time for Tyner, Asante, Extensions, My Favorite Things, A Love Supreme, Sama Layuca, Expansions
Paul Bley
Footloose, Touching, In Haarlem, Ballads, Paul Bley With Gary Peacock
Ahmad Jamal
Extensions, The Awakening, Jamal Plays Jamal, Freeflight, But Not for Me: Ahmad Jamal Trio at the Pershing
Bill Evans
Sunday at the Village Vanguard, You Must Believe in Spring, Explorations, Bill Evans at Town Hall, Volume One, What's New
Sun Ra
Secrets of the Sun, Angels and Demons at Play, The Magic City, The Heliocentric Worlds of Sun Ra, The Futuristic Sounds of Sun Ra
Cecil Taylor
Looking Ahead!, The World of Cecil Taylor, Jazz Advance, Into the Hot, Jumpin' Punkins
Bobo Stenson
Underwear, Witchi-Tai-To, Sart, Terje Rypdal, One Long String
Stanley Cowell
Members, Don't Git Weary, Patterns, Medina, Live at Slugs', Volume 1, Why Not
Horace Silver
Finger Poppin' With the Horace Silver Quintet, Song for My Father, The Tokyo Blues, The Cape Verdean Blues, The Jody Grind
Joachim Kühn
Bold Music, Interchange, Smoke, Cinemascope, Mama Kuku, Prime Time
Hugh Lawson
The Complete Yusef Lateef, Jazz 'Round the World, Yusef Lateef's Detroit: Latitude 42° 30' Longitude 83°, Prime Time, The Free Slave
Chick Corea
Now He Sings, Now He Sobs, Big Fun, The Philosophy of the Spiritual, Return to Forever, Laws' Cause, Monday Night at The Village Gate
Duke Pearson
The Phantom, Electric Byrd, "Wahoo!", Kofi, Idle Moments
Gil Evans
The Individualism of Gil Evans, Out of the Cool, Gil Evans & Ten, Blues in Orbit, Trance
Steve Kuhn
Basra, The October Suite, Three Waves, Childhood Is Forever, Sound Pieces
Jan Johansson
Jazz på svenska, In pleno, Musik genom fyra sekler med Jan Johansson
John Lewis
Modern Jazz Quartet Vol. 2, Fontessa, Third Stream Music, Improvised Meditations & Excursions, Pyramid
Michael Garrick
Moonscape, The Heart Is a Lotus, Prelude to the Heart is a Lotus
Dollar Brand/Abdullah Ibrahim
African Space Program, Duke Ellington Presents the Dollar Brand Trio, The Dream: Live in Copenhagen, Banyana
Krzysztof Komeda
Astigmatic, Rosemary's Baby, Cul De Sac, Knife in the Water
Masabumi Kikuchi
One Way Traveller, In Concert, Hollow Out
Svein Finnerud
Preachers - The Unreleased Works 1969 to 1980, Svein Finnerud Trio, Plastic Sun, Thoughts
Bayeté/Todd Cohran
Head On, Love, Love, Worlds Around the Sun