HELLO DEVYANSHU :)
HERE'S THE ANSWER -
There is no supreme powered or best ruler in the medieval period. However, there were several and courageous rulers and kingdoms in medieval period. Some examples of dynasties/kingdom are-
1) The Slave Dynasty
2) The Khailji Dynasty
3) Tughlaq Dynasty
4) Tirmur Dynasty
Courageous rulers-
1) Akbar
2) Aurangzeb
3) Jahangir
4) Babur
5) Humayun
6) Shah Jahan
CHEERS!!!!