i've always had this really nasty mean male guppy every female i put him with he killed he would stress them out make them hide then bit them (alot) then chase them and eventually they would die so i am left with this one male guppy i put him in my 10 gallon there is a zebra in that tank that he likes to chase but the guppy isn't fast enough but the zebra bits his fins

i recently got asked if i wanted some fancy guppy babies i said i would get back to them but the only problem is the male guppy i have room in my tank for them it's a heated to 79 - 80 degrees filtered very well and a bubble wall it's the perfect enviroment but that male guppy is holding me back from getting other fish don't get me wrong he is cute and colourful

help?