He can't

The Christian definition of Messiah requires certain signs of proof. He must:

1. heal the wounded
2. revive the dead
3. Bring good news to the poor

No miracles from NotJesus means by definition he isn't the Messiah.

The Jewish Definition states that the Messiah must:

1. gathering of the exiles (this is the lost 10 tribes of Israel. Doing this will take an epic amount of work as those lost tribes don't even know they're lost, if they even still exist!).
2. restoration of the religious courts of justice
3. an end of wickedness, sin and heresy (not sure how a no-miracles Jesus is going to be able to do this.)
4. reward to the righteous (A no-miracles Jesus is going to have trouble scaling this up in any meaningful, tangible way.)
5. rebuilding of Jerusalem (how would you even interpret this? Jerusalem is a living city now.)
6. restoration of the line of King David (Not sure how you'd prove this as no DNA from that period exists or is trustworthy.)
7. restoration of Temple service (Doing this requires removing the Dome of the Rock from the Temple Mount in Jerusalem. A no-miracles Jesus is going to find himself very dead from some very very angry Muslims.)

Any kind of no-miracles, not-Jesus isn't going to get anywhere.

He can't

The Christian definition of Messiah requires certain signs of proof. He must:

1. heal the wounded
2. revive the dead
3. Bring good news to the poor

No miracles from NotJesus means by definition he isn't the Messiah.

The Jewish Definition states that the Messiah must:

1. gathering of the exiles (For most modern Jews, this gathering applies only to the house of Judah).
2. restoration of the religious courts of justice
3. an end of wickedness, sin and heresy (not sure how a no-miracles Jesus is going to be able to do this.)
4. reward to the righteous (A no-miracles Jesus is going to have trouble scaling this up in any meaningful, tangible way.)
5. rebuilding of Jerusalem (how would you even interpret this? Jerusalem is a living city now.)
6. restoration of the line of King David (Not sure how you'd prove this as no DNA from that period exists or is trustworthy.)
7. restoration of Temple service (Doing this requires removing the Dome of the Rock from the Temple Mount in Jerusalem. A no-miracles Jesus is going to find himself very dead from some very very angry Muslims.)

Any kind of no-miracles, not-Jesus isn't going to get anywhere.