"And yet all of these, although they received a favorable witness because of their faith, did not obtain the fulfillment of the promise, because God had foreseen something better for us, so that they might not be made perfect apart from us." (Hebrews 11:39,40)
In those verses, Paul was referring to two groups: "all of these" (Samson, Sarah, Abraham, Moses, Samuel, David, etc) who had the hope of living forever on the earth and then "us" (Paul and the Christians in the first century who were anointed to be part of the Kingdom government in heaven).
He wasn't talking about the resurrection of the 144,000 when he said "all of these".
But Paul did say at 1 Thessalonians 4:13-18:
"Moreover, brothers, we do not want you to be ignorant about those who are sleeping in death, so that you may not sorrow as the rest do who have no hope. For if we have faith that Jesus died and rose again, so too God will bring with him those who have fallen asleep in death through Jesus. For this is what we tell you by Jehovah’s word, that we the living who survive to the presence of the Lord will in no way precede those who have fallen asleep in death; because the Lord himself will descend from heaven with a commanding call, with an archangel’s voice and with God’s trumpet, and those who are dead in union with Christ will rise first. Afterward we the living who are surviving will, together with them, be caught away in clouds to meet the Lord in the air; and thus we will always be with the Lord. So keep comforting one another with these words."
When Jesus called Lazarus out of the cave where he was buried, he called him with a loud voice. When Jesus descends from heaven to the earth "with a commanding call, with an archangel's voice and with God's trumpet" it is going to be much "louder". Loud enough to wake the dead. Everyone will know.
Revelation shows that during the great tribulation when Jesus resurrects the anointed ones who have died, everyone will know. Paul, Peter, Mary, James, Mary Magdalene...they will all be walking around in materialized bodies just like Jesus did for those 40 days after he was resurrected. Everybody will know they've been resurrected.