How many churches are teaching that baptism is not important?

Is it occurring more and more that churches are claiming that baptism is not necessary? What are some names of churches saying this? Someone told me that Baptist is one of them. How wide spread is this idea? What are the name of the few churches that hold to baptism as essential? I believe Jesus would not of waisted his time getting baptized and setting the example if it was not necessary. It was to pro-fill his righteousness.