Whom did Moses summon to carry the bodies of Nadab and Abihu out of the camp?

Answer: Mishael and Elzaphan

Mishael and Elzaphan, sons of Aaron's uncle Uzziel, carried their cousins outside the camp, still in their tunics.

“Moses summoned Mishael and Elzaphan, sons of Aaron’s uncle Uzziel, and said to them, “Come here; carry the bodies of your cousins outside the camp, away from the front of the sanctuary.” So they came forward and carried them, still in their tunics, outside the camp, as Moses had directed.”— Leviticus 10:4-5 (BSB)