Who's the third dead death eater???

[nkafkafi]

No: HPFGUIDX 105557

Checking something in the graveyard scene (GoF, Ch. 33) I just came 
across something I've missed before: The largest gap in the DEs 
circle includes 3 empty places, where LV says should have stood three 
DEs who are "dead in my service". OK, I know two of the DEs he means: 
Rosier and Wilkes. But who's the third? Am I missing someone obvious? 
He can't be meaning Regulus Black, right?

An unaccounted DE is a very suspicious thing, even (or especially) if 
he's supposed to be dead.

Neri