OKC gets about 20 points a game from their top 4 bigs (Serge, Perk, Collison, Nazr).
The 95-96 Bulls won 72 regular season games with its top 4 bigs at about 23 ppg (Longley, Rodman, Wennington, Simpkins). That team scored just over 105 points a game with almost all coming from the perimeter (jordan at 30, pippen at 20, and kukoc at 13 - no one else in double figures). In the playoffs they had essentially three bigs, Longley at 8.3, Rodman at 7.5, and Wennington at 3.0. Salley played in 16 of the 18 games and averaged just under 1 point a game, and would probably be considered the 4th big. The Bulls did play small a fair amount with Kukoc playing with Pippen and Jordan a fair amount, but Kukoc was definitely a SF for most of the season. The same held fairly consistent in each of hte next two title teams for the Bulls.
I guess the point is, if your perimeter is good enough you can win a title without much post offense just like the Bulls did three straight times.