How can I get him here for a visit or to live?

If you are a U.S. citizen you and your fiance could go through the process of applying for a fiance visa that would enable him to enter the U.S., then become married to you within 90 days, then complete the adjustment of status application process by which he would become a Lawful Permanent Resident (get a "Green Card"). Alternatively, you could travel to Ghana and become married, and the sponsor him in an application for consular processing in the Immediate Relative visa category.

Have you tried a K visa?

First, the US government controls the US Embassy which issues visa, not the Ghanan Government. That means that paying bribes is not tolerated. Second, if he has immigrant intent for the purposes of the visit, that is, he is your fiance and intends to marry you and stay in the U. S., then he must be denied a visitor visa. A U. S. counselor official must presume immigrant intent, but he must overcome that presumption. Otherwise, he will be denied a B2 visitor visa. As a result, if you are or US citizen, then you may petition him for a fiance visa. I strongly recommend an appointment with a competent and experienced immigration attorney. The above is general information, not legal advice, and does not create an attorney client relationship. Good luck.