My name is Ozzy!

My wife and I have had Ozzy since he was a baby. He was full of energy and personality. Ozzy does well with large dogs and older male cats. Ozzy instantly did not get along with our older female cat. We tried multiple things to get them to get along and it has been over 2 years of trying. Ozzy likes to be the only cat playing and really likes to be involved.Ozzy has stopped playing and is depressed. Ozzy is now 26 pounds. We try playing with him but he gets upset when the other cats try and play. It has been really hard on Ozzy since June of this year when we had to put down his best friend, our 14 year old lab. So now Ozzy has been acting out more and attacking our older female cat to where it is unsafe and we have to keep them behind closed doors in other parts of the house. Which is not a way for either to live. We are hoping to find a home where Ozzy is around male cats or large breed dogs.