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I'm thinking your tank was uncycled and that, along with the stress of the ich, killed him. It typically takes much longer than 10 days to cycle a tank. Did you use a piece of filter media from your friend or a bottled bacterial supplement? If not, your tank likely wasn't...
I would give them a week or two to establish the pecking order. If that doesn't work out, I would either remove the aggressor and/or add 1-2 more males to spread out the aggression.
With females you'll soon be overrun with fry unless you have ways to rehome or sell them.