Jesus was the only one that came back in the Xian religion (aside from Lazarus, who was brought back by Jesus). Thus considering him unique is perfectly reasonable in context of Xian belief.
1 Kings 17:20-22, KJV wrote:
He called to the LORD and said, "O LORD my God, have You also brought calamity to the widow with whom I am staying, by causing her son to die?" Then he stretched himself upon the child three times, and called to the LORD and said, "O LORD my God, I pray You, let this child's life return to him." The LORD heard the voice of Elijah, and the life of the child returned to him and he revived.
2 Kings 4:32-35, KJV wrote:
And when Elisha was come into the house, behold, the child was dead, and laid upon his bed. He went in therefore, and shut the door upon them twain, and prayed unto the LORD. And he went up, and lay upon the child, and put his mouth upon his mouth, and his eyes upon his eyes, and his hands upon his hands: and stretched himself upon the child; and the flesh of the child waxed warm. Then he returned, and walked in the house to and fro; and went up, and stretched himself upon him: and the child sneezed seven times, and the child opened his eyes.
2 Kings 20-21:20, KJV wrote:
Elisha died, and they buried him. Now the bands of the Moabites would invade the land in the spring of the year. As they were burying a man, behold, they saw a marauding band; and they cast the man into the grave of Elisha. And when the man touched the bones of Elisha he revived and stood up on his feet.
Matthew 9:18, 23-25, KJV wrote:
While He was saying these things to them, a synagogue official came and bowed down before Him, and said, "My daughter has just died; but come and lay Your hand on her, and she will live." [...] When Jesus came into the official's house, and saw the flute-players and the crowd in noisy disorder, He said, "Leave; for the girl has not died, but is asleep." And they began laughing at Him. But when the crowd had been sent out, He entered and took her by the hand, and the girl got up.
Luke 7:12-15, KJV wrote:
Now when he came nigh to the gate of the city, behold, there was a dead man carried out, the only son of his mother, and she was a widow: and much people of the city was with her. And when the Lord saw her, he had compassion on her, and said unto her, Weep not. And he came and touched the bier: and they that bare him stood still. And he said, Young man, I say unto thee, Arise. And he that was dead sat up, and began to speak. And he delivered him to his mother.