Yes, the original Greek all translate to one word "oudeis (οὐδείς)", which means no one.
This literally means not one.
"No one has seen God at any time; the only begotten God who is in the bosom of the Father, He has explained Him." (John 1:18)
See Greek translation here: https://www.scripture4all.org/OnlineInterlinear/NTpdf/joh1.pdf
"No one has seen God at any time; if we love one another, God abides in us, and His love is perfected in us." (1 John 4:12)
See Greek translation here: https://www.scripture4all.org/OnlineInterlinear/NTpdf/1jo4.pdf
"...He who is the blessed and only Sovereign, the King of kings and Lord of lords, who alone possesses immortality and dwells in unapproachable light, whom no man has seen or can see." (1 Timothy 6:15-16)
See Greek translation here: https://www.scripture4all.org/OnlineInterlinear/NTpdf/1ti6.pdf
"Oudeis" generally means no one or no human. Just as we use the term "no one" to generally and contextually mean no human, so also the Greek word means this as well.
When we look at Jesus' words about His second coming, the word "oudeis" appears again.
"But of that day and hour no one knows, not even the angels of heaven, nor the Son, but the Father alone." (Matthew 24:36)
https://www.scripture4all.org/OnlineInterlinear/NTpdf/mat24.pdf
So when Jesus said this, He means that only God the Father knows when He will send the Son.
This knowledge is kept from all humans and even angels.
Jesus' disciples asked Jesus the same thing.
"So when they had come together, they were asking Him, saying, 'Lord, is it at this time You are restoring the kingdom to Israel?' He said to them, 'It is not for you to know times or epochs which the Father has fixed by His own authority; but you will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth.'" (Acts 1:6-8)
So it is not for any human to know when Jesus will come. God the Father has fixed the time by His own authority and has kept it a secret. God the Father will tell God the Son (Jesus) when it is time to come.
For this reason, Jesus told us to prepare for His coming, treating each day as if He could come at any time.
In fact, Jesus told a parable about this.
Jesus said: “Then the kingdom of heaven will be comparable to ten virgins, who took their lamps and went out to meet the bridegroom. Five of them were foolish, and five were prudent. For when the foolish took their lamps, they took no oil with them, but the prudent took oil in flasks along with their lamps.
Now while the bridegroom was delaying, they all got drowsy and began to sleep. But at midnight there was a shout, ‘Behold, the bridegroom! Come out to meet him.’” (Matthew 25:1-6)
The foolish virgins were unprepared.
Jesus said: "Later the other virgins also came, saying, ‘Lord, lord, open up for us.’ But he answered, ‘Truly I say to you, I do not know you.’ Be on the alert then, for you do not know the day nor the hour." (Matthew 25:11-13)
So Jesus will certainly come by surprise, during a time many people do not think He will. Therefore, according to the Bible, not everyone in the church will be raptured (taken by Jesus to His kingdom). The foolish virgins are lip-service Christians who will be unprepared for Jesus' coming. They will be left behind.
Jesus taught us how to be prepared for His coming.
He said: "Be on guard, so that your hearts will not be weighted down with dissipation and drunkenness and the worries of life, and that day will not come on you suddenly like a trap; for it will come upon all those who dwell on the face of all the earth. But keep on the alert at all times, praying that you may have strength to escape all these things that are about to take place, and to stand before the Son of Man” (Luke 21:34-36)
So we should be obeying God (not be weighed down with dissipation and drunkenness), looking forward to His coming (so that it is not a trap for us), and focused on the kingdom of God (keeping alert at all times and not weighed down with the worries of life).
We also need to pray that we may have the strength to escape the Tribulation and to stand before Jesus without shame.