Which preposition to use with flawless

in Occurrences 4%

That at least is the philosophy of the German war lords, and granted the premises that war may be waged by one people against another it seems to me sound and flawless in its abomination.

as Occurrences 2%

Her present serenity was as flawless as the sea's, though, unlike the sea, she sparkled.

through Occurrences 1%

But most because, from mine and desk and mart, Springing to face a task undreamed before, Our men, inspired to play their prentice part Like soldiers lessoned in the school of war, True to their breed and name, Went flawless through the fierce baptismal flame.

Which preposition to use with  flawless