I grew up on Demolition so by the time LOD debuted in WWF, I wasn't too won over (for no particular reason, unlike most modern legends, I've never gone back and checked out their old matches), but I wouldn't expect anyone else to take that spot.
Dudleys, yeah, they're unfortunate; missing out on a placing due to inter-promotional politics.
In response to a number of posts above... There is NO way the original Hart Foundation should be left out. They go hand in hand with the Bulldogs IMO (Bit like the Piper/Hogan relationship) and if pushed, I'd say they made for a better team. Could never imagine the Bulldogs going heel, whereas the Harts had good title reigns as both.
As for The Hardy's, good as they were/are, they always just came off as a less 'pretty' Rockers to me except without so much tandem offense (which I think is a high ranking quality in any team and what's sorely missing from most tag matches these days).
Road Warriors
Dudleys
Hart Foundation
Rockers
Bulldogs
Never gonna rank all-time, but I used to love theses guys: