All of the scenarios have clear ways to victory. If Dr. King were here, he'd be on my side. Your side can't say that.
Well, his widow Coretta Scott King, who knew his heart reasonably well, supported both anti-discrimination laws covering sexual orientation in Dr. King's name, and was an early endorser of same-sex marriage before her death in 2006. While the 1960s were prehistoric times for gay rights--even being gay was illegal in many states until 2003!--we have seen how other civil rights advocates from the era such as John Lewis have evolved.