Maybe it's 20/20 hindsight but I think the Jordan/Pippen synergy was really special.
Pippen had the perfect mental makeup to be Jordan's #2 - deferential in terms of scoring, bringing everything else to the table on both offense and defense, and with the same killer instinct. Pippen could set the table offensively, he was a good rebounder, and he could guard the other team's best player at any position of PG/SG/SF, which took a load off Jordan energy-wise.
And those guys together were an absolute terror when they both locked in defensively at the end of games. I think that aspect of those teams was probably the thing that elevated them to all-time great status.
I just can't see another set of players checking all of those boxes.