After his acrimonious split with the UFC, it seems unlikely Ngannou will fight for the MMA promotion again.
But that has not stopped rumours a fight with UFC champion Jon Jones could happen at some stage.
The PFL says it is willing to work with its rival series, but UFC president Dana White has until now always been against the idea.
PFL's Davis thinks Jones is the best option for Ngannou, but the UFC's two-weight champion is set to miss the next nine months after undergoing surgery on a pectoral tendon.
Jones was due to defend his heavyweight title against Stipe Miocic at UFC 295 next week before injuring himself.
"There's only one guy in MMA who is interesting right now for Francis Ngannou: Jon Jones," Davis said on the MMA Hour., external
"Everybody says, what about Stipe? Maybe. Give him a half a point, 1.5 guys who are compelling.
"I don't want to say who could put on a good fight for him. There are three or four other guys who could put on a competitive fight for Francis.
"I'm not talking about a competitive fight, I'm saying compelling."
ncG1vNJzZmivp6x7o67CZ5qopV%2BovbC%2B02iZqLCZo7RwgpZrbm1pY2w%3D