Talk to agents. Most work with lenders who they have conducted previous transactions. They will refer you the ones that will get the job done in a quick and efficient manner. If you have any questions, feel free to contact me. I work for a mortgage broker and can guide you to those we use.
Speak to some Realtors and ask them to suggest a company or two. We deal with lots of lenders and know which are the best in the area we cover. I would never use a lender I can not go sit down with and talk face to face with, that's my 1st rule.