Depends on what one means by savior.
The concept of a savior is not a Christian one. The concept of needing a savior to wipe away one’s sins is a Christian concept, but even this exists in other religions. (One example that comes to mind is the Imam according to Ismaili Shia Islam, who can forgive sins and will usher his followers to Heaven on the Day of Judgment. According to some Twelver/Ithna Ashari Shias, one cannot enter Heaven unless one acknowledges the Imam of the time, which would make the Imam some sort of savior-figure.)
A savior is also one who will come and save the faithful from the trials, tribulations, and imperfections of the world, ushering in an age of righteousness, goodness, and universal rule by God.
According to some, this savior is also a warrior figure, who will fight against the forces of evil and save the faithful. This view is dominant in Christianity and Judaism.
The coming savior will come to preach and convert the world to Islam, after which the Day of Judgment will come. There are some Muslims, such as South Asian Muslims, who believe that Isa (Jesus) and Imam Mahdi will come before the end of time, although who will come first and what sequence of events will transpire I do not know. I do know that the Imam Mahdi is supposed to rule a pure state.
Another interesting commonality, at least between Christianity and Islam, is an anti-Christ figure - one parading around like one sent from God but in reality in the service of the Devil. Anti-Christ in Christianity, Dajjal in Islam. Both will be defeated by the Savior.
Oftentimes, this person to come is called the Messiah, but I hesitate to use that term because it has a very specific Jewish background that is not compatible with the views of the person to come in other religions. “Messiah” comes from the Aramaic “Mashiach,” meaning “Anointed,” as in having been anointed by God to rule and fight (anointing being a part of coronation rituals). As such, Kalki, Maitreya Buddha, Jesus in Islam, Imam Mahdi, and Saoshyant cannot be called Messiahs in the true sense of the term.
Having a savior-figure is, as others have said, very convenient. It gives the faithful hope. In addition is also allows the faithful to bear their persecutions without lashing out - the savior will come and seek vengeance for their grievances, and it is not for the faithful to seek it.
Keep the responses coming! I’d like to hear something from someone who believes in a savior-figure to come. I’m sure they’re out there!
WRS - may he come speedily, in our days! Amen!