unexceptionable

/ˌʌnɪkˈsɛpʃənəbəl/
adjective
  1. Not open to any objection or criticism; perfectly acceptable or satisfactory.
    • He gave an unexceptionable answer that satisfied everyone in the room.
    • The committee found the proposal unexceptionable and approved it without debate.
    • Her behavior at the formal dinner was completely unexceptionable.