I think it's Chumvi from TLK: 6NA.
He's stocky, a pridelander, but most importantly has dark fur and a brown mane.
So how would it play out?
Well...
I think Kula was Scar's daughter and once he became king he bethrothed her to Chumvi(giving him a reason to let Chumvi live). Zira came along and after she had Nuka, deamed useless, she was kicked to the curve. Chumvi felt sorry for Zira and the two started to hang out. Once Scar sees none of the lionesses will mate with him, he calls Zira back. Months later two cubs are born, Kovu being Chumvi's and Vitani being Scar's.
What do you guys think!?
Note: Thread was originally about a vid on youtube called Stutin like Mufasa, but since it goes against the UVR, i changed it(in case you were wondering what me an Snow were talking about.). Please not that the thread is now about who Kovu's father is now so i don't want to see anything reffereing to me and/or snow. Thank you.