Luis Miguel Gallego Basteri 

I would consider your move from Luis Miguel to Luis Miguel Gallego Basteri as a highly controversial renaming of an article. Please do not take offense, but I am positive that you are not familiar with this topic, or Spanish culture in general. Here are my thoughts on this:

 Luis Miguel is a singer of worldwide fame and much more notable than the other four Luis Miguels that you included in that disambiguation list.
 Luis Miguel is much more of a public figure than any other Luis Miguel, since he is a Grammy winner and is often romantically associated with big stars, such as Mariah Carey, Daisy Fuentes, etc.
 Please also note that "Luis Miguel" is his professional name, and that is why he is notable, he is not a scientist or politician or any other profession where a full name is used. 
 Also only one of the other Luis Miguels has an article, therefore people looking for "Luis Miguel" will be taken to that disambig page while almost all of them will be looking for the singer and not anybody else. 
 In addition, none of the other Luis Miguels go by "Luis Miguel" only the singer. 

I will strongly suggest you moved the page back to Luis Miguel and create another Luis Miguel (disambiguation) page.

Respectully,