Which denominations follow prosperity theology? In the comments of an answer to another question, the topic of prosperity theology was raised, and someone stated that a large portion of Christianity is in some way supportive of prosperity theology. I am defining prosperity theology as the following:


  Financial blessing is the will of God for Christians, and that earthly prosperity is a reward for those who follow God.


I personally don't know of any mainstream denominations that espouse prosperity theology (most that I've heard of are non-denominational or independent churches - e.g. Joel Osteen's congregation). I'm not asking if prosperity theology is Biblical or not, I'm asking are there any mainstream denominations that espouse prosperity theology?
This a good question but at the same time it is difficult to make a list of all the denominations. Many Christians and Denominations believe in Prosperity theology but not necessarily included in their core doctrines.
Some notable ones being Word of Faith and other Pentecostal Denominations. 

Let's give one example. 

David Yonggi Cho, a Korean pastor of the world's largest congregation church, Yoido Full Gospel Church affiliated with the Assemblies of God , is known for his teachings about prosperity.  He emphasizes giving Tithe, Offerings and Seed Faith. "The more you give to God, the more you get" is one of his teachings. His words as mentioned in Wikipedia:


  "We must rethink our misguided thoughts considering material wealth as
  being equated with sin. We must drive out our subconsciously rooted
  thoughts of poverty, condemnation and despair. God acts in concordance
  with our conscience; If our thoughts are filled with poverty and
  despair, God bless us with material blessing."


He is famous for his strange teaching about the "Fourth Dimension". He teaches that we need to learn how turn On our spiritual tap of blessings which is from the fourth dimension and that we need to practice how to exercise our faith in this matter in order to get spiritual and material blessings.