If my memory is correct, our Torah teaches that the Melech HaMashiach will be identified by Eliyahu HaNavi, and later confirmed by the Sanhedrin.
The opinions of ordinary people will not count, not at all.
The vast majority of Chareidim will never accept any candidate for the Melech HaMashiach who is Sephardic or a Baal Teshuvah or Modern Orthodox or Religious Zionist, even though there is no Halachic reason why those people should be automatically disqualified — but Chareidim have a very low opinion of those people, so they will never consider it.