Ignoring the possibility of this occurring in the first place, your objection to her father being alive has rather a large hole:
“The flesh of his servant, willingly given; the blood of his foe, forcibly taken; and the bone of his ancestor, unknowingly bequeathed. Voldemort is a perfectionist...and he would certainly seek the most powerful combination: the flesh of Bellatrix Black, the blood of Harry Potter, and the bone of his father.”
This could have been because Voldemort’s father was actually in a grave at the time; the ritual might not always require that.
Ignoring the possibility of this occurring in the first place, your objection to her father being alive has rather a large hole:
She has other ancestors she could use.