Zaknafein Do'Urden, fighter 16th (no feats Athlete feat)
Using standard array (15, 14, 13, 12, 10, 8)
Str 14
Dex 17 (15+2 elf)
Con 12
Int 8
Wis 10
Cha 14 (13+1 dark elf)
ASI 4th level (Str 16)
ASI 6th level (Dex 19)
ASI 8th level (Str 18)
ASI 12th level (Str 20)
ASI 14th level (Athlete feat, Dex 20)
ASI 16th level (Dex 22)
oh my, is that a headband of intellect!?! sweet!
Str 20, Dex 22, Con 12, Int 8(19), Wis 10, Cha 14
Ok, so the numbers don't quite add-up (Con 12 instead of 16, Wis 10 instead of 12), and the headband thing is cheesy as heck, but the Str 20/Dex 22 part doesn't seem to be out of reach of a 16th level character, despite the public outcry.
[edit] Standing Leap ability looks like the Athlete feat (kind-of) put in a NPC template, which gives +1 Dex (or +1 Str, feel free to invert starting Str and Dex)
[edit2] The build works if you start with an array of 16, 15, 14, 13, 12, 10, which I've seen (and used) many times. So again, very similar to many home games' 16th level character.