Best Airlines for Africa flights?

I am trying to put together a trip this year. I will mostly likely be
flying from Los Angeles to Kigali, Rwanda then a flight from Kigali to
Tanzania and then back to Los Angeles.

What airlines do you recommend to start checking for decent Africa
flights? are there good wholesalers?

Best combination I have found uses KLM.
And this is through a consolidator.
They include Kenya Airways into Kigali
since it is a codeshare with KLM.

The problem is finding a good fare out of
Kigali. Rwanda Express is the least, but so
far, haven't found a way to issue their
tickets here in the US. They do, however,
fly to Kilimanjaro. Or at least, they show that
on their schedules.