The First Seal, First rider of the apocalypse is *NOT* the antichrist.
1I watched as the Lamb opened the first of the seven seals. Then I heard one of the four living creatures say in a voice like thunder, “Come!” 2I looked, and there before me was a white horse! Its rider held a bow, and he was given a crown, and he rode out as a conqueror bent on conquest.
The key words are Nikese/Nikon and Stephanos the victor's crown.
νικῶν (nikōn) Verb - Present Participle Active - Nominative Masculine Singular Strong's Greek 3528: To conquer, be victorious, overcome, prevail, subdue. From nike; to subdue.
Stephanos a crown a mark of royal or (in general) exalted rank the wreath or garland which was given as a prize to victors in public games metaph. the eternal blessedness which will be given as a prize to the genuine servants of God and Christ: the crown (wreath) which is the reward of the righteousness that which is an ornament and honour to one
To the one who is victorious (nikon), I will give the right to eat from the tree of life, which is in the paradise of God.
The one who is victorious (nikon) will not be hurt at all by the second death.
To the one who is victorious (nikon), I will give some of the hidden manna. I will also give that person a white stone with a new name written on it, known only to the one who receives it.
To the one who is victorious (nikon) and does my will to the end, I will give authority over the nations— 27that one ‘will rule them with an iron scepter and will dash them to pieces like pottery’ b —just as I have received authority from my Father. 28I will also give that one the morning star. 29Whoever has ears, let them hear what the Spirit says to the churches.
The one who is victorious (nikon) will, like them, be dressed in white. I will never blot out the name of that person from the book of life, but will acknowledge that name before my Father and his angels.
The one who is victorious (nikon) I will make a pillar in the temple of my God. Never again will they leave it. I will write on them the name of my God and the name of the city of my God, the new Jerusalem, which is coming down out of heaven from my God; and I will also write on them my new name.
To the one who is victorious (nikon), I will give the right to sit with me on my throne, just as I was victorious and sat down with my Father on his throne. 22Whoever has ears, let them hear what the Spirit says to the churches.”
These quotes from revelation 2 and 3 are clearly speaking of the same character described in Revelations 6:1-2. We can tell this by the way each of these quotes from 2 and 3 describe this person with the same language: Victorious. The rider in 6:1-2 is given a victor's crown (stephanos) and overcomes/conquers (nikon).
Claims that the rider is the antichrist are not supported by anything as far I can tell, but I would have to see the justifications of people who have made these claims to specifically address them