Just my opinions:
People can be inspired by god at various times regardless of who they are or what religion they belong to. I wouldn't be surprised if people like Constantine, Martin Luther, and even Inventors have been inspired by god to fulfill various necessary events in the his design. Are they prophets? No. A 'prophet' is the spokesman of god and as such is generally only one. However technically anyone who is inspired by god and has a testimony of christ is a prophet.
10 And I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy. (New Testament, Revelation, Chapter 19)
All truth can be circumscribed into one great whole: all truth comes from god. LDS always say there is truth in all things, Buddhism, Islam, Hinduism, Methodism etc all have truth in there. Are the authors prophets? No. But are they inspired by god? I think so at least in part.
Take me for example; I have had heaps of 'revelations' at various times in the temple and at other times. I've had all sorts of otherwise unexplainable coincidences happen to me which I can only explain that god lives. I have received revelation from god. If I wanted, I could go away and like Muhammad write over forty years a long book which contains various peices of wisdom I've gained, some stories of my life, and chuck in these revelations I've had and call it a book of scripture. Was part of my book inspired by god? Yes. Am I a prophet and the book from god? No. It's just a book containing true things and a few things I've learned from god. This is how I explain things like the Quran which I don't think is a book from god but I don't ignore the possibility that Mahamad may have at points had revelation from god. After all in some ways (not what you see on tv I've actually been to Islamic states) in some ways it is a beautiful religion. Part of that must be inspired.
What is the purpose of our prophet now? What's president monson required for? To declare coca cola okay? To reveal more ancient scripture? I don't think it's required. His role at the moment is to provide direction for the members and to lead the church in building up the kingdom of god. Does god need him to lead us across a desert, or find buried scriptural documents, or reveal new doctrines, or attempt to become the president of the united states? No I don't think so, at least not at the moment. I think the prophet is required to be the spokesman of god when required nothing more. He doesn't need to be doing freakish acts he's just a humble servant of the lord.
If you mean would god call a moses-like prophet to another church? No I don't think so and it would be counterintuitive to think that if you're LDS. It wouldn't make sense. I've been to other churches and watched heaps of Christian videos and sermons by preacher and pastors and one thing that always strikes me is the absence of the spirit. Not all the time though as there have been times where I have felt the holy ghost at other churches, but nothing like when I'm at general conference, that is way more powerful. Would god support people joining a baptist church or the catholic church? Well I don't know. But I would say A church is better than no church and so I think that its possible that some leaders of other churches will likely receive guidance from the holy ghost to promote faith in.god.
6 And whatsoever thing is good is just and true; wherefore, nothing that is good denieth the Christ, but acknowledgeth that he is. (Book of Mormon, Moroni, Chapter 10)
13 And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
14 If ye shall ask any thing in my name, I will do it. (New Testament, John, Chapter 14)
20 For where two or three are gathered together in my name, there am I in the midst of them. (New Testament, Matthew, Chapter 18)
These things apply regardless of what church you belong to.