I didn't know this type of disease was prominent with yellow tangs. I thought they were pretty durable/hardy.
Anyway, you say it happened years ago and if water quality was the issue then, I'll bet you're better with it now.
I'd say go for it and get another now. Be aware they can be pretty territorial and should be put in last. And maybe consider a smaller one so it doesn't come in being the bad boy.
Otherwise, you may consider a canary blenny. They swim out in front, are a nice yellow color, are smaller, and have lot of personality. Very curious in nature. Always checking things out. Don't hold him though. Venoumous fangs and will bite in self defense only.
"Life may not be the party we hoped for but while we are here we might as well dance!"