John the Baptist
From “Tota Scriptura”, Joey Day’s personal Scripture topic index wiki
Was the Elijah to come
Isa 40:3; Mal 3:1; 4:5–6; Mt 11:7–15 (cf. Lk 7:24–28); Mt 17:10–13 (cf. Mk 9:11–13); Lk 1:13–17 — see also 2Ki 1:8; Mt 3:4 (cf. Mk 1:6)
Though John himself denied it (!)
Jn 1:19–21