Mashiach is a tzadik nistar so no one famous we know is likely to be mashiach.
He will come out of nowhere, and when it is really Mashiach, its not going to be a question. Everyone will know and it will be as clear as daylight.
Of course, there are gonna be people who don’t follow- those are the people that are not going to be zoche to go to yerushalayim.
But if you are a G=d fearing yid, it’ll be clear and we will all know.
I hope it comes soon!!! I’m so excited!!