The Real Estate Settlement Procedures Act (RESPA) prohibits agents from receiving a "thing of value" from a lender in exchange for sending you its way, and this inhibits them from entering into quid pro quo arrangements that might not be best for their clients. The agent will know which lenders perform and which can be counted on to hold up closing (1).
Below are the following lenders that previous buyers and clients of ours have worked with:
(1) National Association of Realtors. "Following RESPA Rules." Accessed March 12, 2020