Not being a smartass, but... Do it. Always interested in history, and you seem well versed.
Here goes - off the top of my head:
(bold = spines with 4 test players; underlined = test captains)
BRISBANE:
Lockyer, Walters,
Langer, Priddis - immediate post SL era
CANTERBURY: Brentnall, Hughes, Mortimer,
Peponis (1980 GF side)
CANBERRA:
Mullins, Daley, Stuart, Walters (1994 GF side)
NORTH SYDNEY:
Taplin, Hodgkins, Thompson, Green (1921 GF side)
ROOSTERS:
Dowling, Norman, Thicknesse, Stehr (mid 1930's)
PARRAMATTA: Taylor, Kenny, Sterling, Edge (1982/3 GF side)
MANLY:
Eadie, Fulton, Stevens, Krilich (1976 GF side); Ridge, Lyons, Toovey, Cochrane (mid 1990s); Stewart, Foran, Cherry-Evans, Ballin (current)
WESTS TIGERS: Hodgeson,
Marshall, Prince, Farrah (2005 gf side)
WESTERN SUBURBS:
McMillan, Hey, Craig, Lindfield (1930's);
Parish, Summons, Holman, Kelly (1961)
BALMAIN:
Jack, Hanley, Freeman, Elias (1988);
Fraser, Craig,
Holloway, McMurtrie (1915)
SOUTH SYDNEY:
Churchill, Doherty, Hawick, Hammerton (mid 1950's)
NEWCASTLE:
O'Davis, Johns, Johns, Jackson (1997 gf)
ST GEORGE:
Langlands, Clay, Smith, Walsh (mid 1960's)
NOTES
- This list contains Australian club sides only. I'm damn sure some Pommy club sides with the likes of Ashton, Cunningham, Millward, Schofield and Murphy would be right up there
- The 1930's Wests spine is credited with with creating the modern style running fullback play off the halves, with McMillan feeding off Vic Hey - arguably our best ever 6. This is how Cronk and Slater play today.
- The Norths spine listed ran the only club backline ever to play test football together - the won our first Ashes series in England and ingers Horder and Blinkhorn will forever hold the top tryscoring records for overseas tours by Ausralians (over 30 tries each). Duncan Thompson was our best halfback pre Johns. Ferd Taplin still holds the record for the most number of seasons in first grade, something ridiculous like 22 years. George Green was the first Aboriginal to play FG RL - his name is on the medal for the best Aboriginal player of the year.
- The Balmain spine of 1915 contains 3 of the best 6 players of the pre 1920's (generally considered to be Messenger, Frazer, Holloway, Craig, Burge and Pearce)
- The first Manly side and the Dragons side contained two Kangaroo Tour captains
- 9 of those spines were all international spines
- The best of them all is probably the Dragons one.
- Not all of them won premierships, but four of them won two comps or more
- The current Storm spine only contains two regular test players. Ten of the listed spines contain two regulars or better
- The Eels spine contains only two internationals, but Taylor is arguably the best defensive fullback of limited tackle football, and Steve Edge captained 5 premiership winning sides.
- That Parramatta side probably really tells the true story of what makes a club side great. The scrumbase of Kenny-Sterling-Price is the greatest ever produced, and drove the best attacking side in limited tackle football - the only side to win three straight in almost half a century.
- The current Storm spine is not even the best spine your club has had. I could have listed the 06-07 spines with Inglis in for Widdop - but being illegal they are not eligible. Besides, your best legal spine was in 99: Ross, Geyer, Kimmorley, Swain
- I even found a pretty handy spine from lol@50uffs!
