My first thought is - get rid!
Once a ram developes the habit of going for you, it will always do it, and no matter how wary you are of it, there will come be a time when you are distracted and he will get you. A farmer near me was killed by a Suffolk ram some years ago.
All rams are not aggressive to that extent, but you have to be aware that any male animal always has the potential to turn on you unexpectedly, so should always be treated with respect.
What you do with him is up to you. I personally wouldn't sell on an unpredictable male for breeding as in a way you would feel responsible if someone gets hurt. I'm sure he would taste very nice!
As for a replacement - again it's what you like. I personally like Suffolks and am getting another this year myself. But I buy direct from the breeder, so can get a better idea of temperament than you do in a market.They are not all nasty - you can get the problem with any breed.
But better luck with your next one.