I believe, "Muslim" is an Arabic word which simply means one who has chosen to dedicate his or her life to God. Similar to the Jews in "shama Israel adoni elohenu adoni ehud" God his a Muslim's king, ruler and leader.
Ameer-ul-Momaineen ("Prince of the Faithful", equivalent of "Defender of the Faith")
Sayyid (Sir/Master)
Imam ("In front", equivalent of Priest/Pastor/Rabbi)
Faqih (Jurisprudential Scholar)
In Shiite Islam exclusively, you also have the Ayatollah (Sign of God, equivalent of a Orthodox Patriarch or Catholic Cardinal sans Pope)
Answer 1
Messenger of God Muhammad SAWW
Imam Ali a.s.
Imam Hussain a.s.
Imam Sadiq a.s.
Imam Mahdi a.s.
Imam Khomeini
Imam Khamenei
There are no formal Muslim missionaries assigned by the Mosque or the Muslim leaders as in Christianity. However, there are some Muslim leaders who can be referred to, on individual bases, by those who are willing to convert to Islam but need to learn about it before converting.
Muslim leaders did and do not try to prevent imperialism. There have been great Muslim empires such as the Ottoman Empire, the Mogul Empire etc. Muslims and Islam was and still are imperialists as is proven by the desire by some for a new Muslim caliphate.
rabbis
there are many Muslim leaders on the level of mosques leaders, Islam State Muslim leader, AlAzhar Muslim leader, The Islamic Union Muslim Leader, ... etc. So whose wife do you ask about?
They are called:PriestMonsignorBishopArchbishopCardinalPope
the title for north Korea leaders are called kings.
The Emperor and the Prime Minister
Iran
prophet
Aga is the title of some spiritual and military leaders, particularly in Turkey but also in other muslim countries.
president pro tempore
Cuba is given the title of a leader.