10. Republic of Brazil
The Republic of Brazil is very large and is part of Latin America. It is said to hold the largest Portuguese speaking population in the world. In addition to that, the media of the country is quite stable and its relations with the rest of the world are quite secure.
9. Republic of Pakistan
Pakistan has a very large Muslim population and powerful nuclear weapons. It is a united country but since it spends a hefty sum on military dictatorship, it has not become truly powerful. In addition to that, even though it has good resources, the battles with India have made the country very weak in these terms as well.
Therefore, if it can replenish these resources and find a way to balance its political standing, it will be able to become more powerful.