From a very basic suggestion, you could probably put together a division 4 league winner with 13 OD on your perimeter starters and 13 ID on your inside defenders.
The 6 guard types in my starting lineup in game 3 of my III.5 finals had five guys with 13 OD (and one with 16), plus the three big men who played had 13/12/11 ID. Of course, I had some obnoxious JS/JR levels and some obnoxious SB sprinkled in too. ;)
I think your statement that "there is more to it" is perhaps the statement that sums it up best of all. Sometimes it seems like the most important thing isn't how good a player's best skill is, but how good their lowest skills are.