I'll give my thoughts since 4WD has spoken. We have no record that Enoch's or Elijah's body tasted of death, other than dying with the Lord Jesus' death which we ALL DID. So many scriptures could be provided, for now, consider:The law of God has judged every believer IN CHRIST and has found them to be RIGHTEOUS, nothing worthy of death, so, we all are dead to the law of God in this sense, it has NO POWER over us because of the spirit of HOLINESS we rendered unto the law IN CHRIST!
What we do not know is this: at what point did God shed them of their earthly bodies and cause them to be able to appear with him in glory~these things are hidden from us and we cannot particularly speak of them at the moment.
According to Hebrews Enoch shed his earthly bodily just after he was taken. From other scripture we know that Enoch and all of the others who died in Christ before Christ came were taken to Abraham's bosom. Then from Daniel and Matthew we know that they received their glorified bodies on the last day that Christ was in the tomb - at the resurrection of Christ.