Q - Will everyone see Jesus in the clouds at the Rapture or just his believers?

A - I believe only his true believers will see him.

The "overcomers" that are obeying his commandants and have a personal relationship with him will see him at that time, nonbelievers will not see him.

John 3:3
Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God.

Backslidden and lukewarm Christians and those that profess to be Christians without being under the blood of Jesus Christ will not see him or be taken in the Rapture, they will have to face the tribulation to prove to God that they are worthy.

I also believe that the true believers that are watching and waiting for the Rapture will receive a special reward for their great faith.

John 10:25-27
Jesus answered them, I told you, and ye believed not: the works that I do in my Father's name, they bear witness of me. But ye believe not, because ye are not of my sheep, as I said unto you. My sheep hear my voice, and I know them, and they follow me:

Revelation 3:16
So then because thou art lukewarm, and neither cold nor hot, I will spue thee out of my mouth.

Matthew 7:21-23
Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? and in thy name have cast out devils? and in thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity.