Hi Jerry,
I keep a few pairs of P. flavigularis.
It seems for me that as bigger the males are as less aggressive they are.
I have two males who are really big and they can be kept (until now) without any Problems with the females. But the smaller ones I have did't tolerate the females for more than a few seconds.
Would be interesting if other P. flavigularis keeper made the same experience.
But the best is to keep each P. flavigularis in a own tank, and just let them together for mating.
Good luck with yours.
Regards,
Markus