Who are the antichrists?

1.  1John 2:22 "King James Bible

"Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son."

2.  Merriam Webster defines antichrist as "one who denies or opposes Christ; specifically"

Who qualify as antichrists as defined in the Bible and in Merriam Webster dictionary? 

 

Those who denies that Christ is God? 

 One who opposes what Christ and his word as written in the Bible?

One changes his word as written in the Bible to lead people away from his truth?