I think it's great that you are doing the article. Here is a quick list (many of which are not necessarily solos) that I was compiling for a project of my own, trying to list the top 20 most important bassists in traditional jazz and their single most representative or important recordings:
Walter Page Lady Be Good Count Basie: America's #1 Band Count Basie
Milt Hinton Pluckin the Bass How Low Can You Go? Anthology of the String Bass Various
Jimmie Blanton Jack the Bear The Blanton-Webster Band Duke Ellington
Leroy Slam Stewart I Got Rhythm The Smithsonian Collection of Classic Jazz Various
Israel Crosby But Not For Me Cross Country Tour 1958-1961 Ahmad Jamal Trio
Oscar Pettiford Tricotism Tricotism Lucky Thompson
Charles Mingus - II.BS
Wilbur Ware Softly, As in a Morning Sunrise Live at the Village Vanguard, Vol. 2 Sonny Rollins
Ray Brown How High the Moon The Oscar Peterson Trio Live at the Stratford Shakespearean Festival - Oscar Peterson
Percy Heath Walkin Miles Davis All Stars Walkin Miles Davis
Sam Jones - having trouble thinking of the most representative performance by him
Jimmy Garrison Acknowledgement A Love Supreme John Coltrane
Paul Chambers So What Kind of Blue Miles Davis (of course there are millions of solos - If I Were a Bell, Visiation, on and on - I chose So What because I was trying to get to ONE song choice and ultimately I think this is symbolic for him
Charlie Haden something off of The Shape of Jazz to Come Ornette Coleman
Scott LaFaro Glorias Step Sunday at the Village Vanguard Bill Evans
Ron Carter My Funny Valentine The Complete Concert 1964 My Funny Valentine + Four & More Miles Davis
Hope this helps in some way.
May I also suggest for solos specifically:
Sometimes I'm Happy - Ray Brown, OP Trio Live in Chicago
Pettiford - Just You Just Me - The Unique Thelonious Monk, Falling in Love with Love, +1 for Stardust
Blanton - Pitter Panther Patter and Sepia Panorama
PC - All of You, Visitation, Please Send Me Someone, If I Were A Bell, Blue Train, Yesterdays, Bye-Bye Blackbird
Mingus - Tensions from Blues and Roots
Best
Matt Rybicki