I first heard of him watching a debate on Homosexuality about 20 years ago involving Walter Martin, Andy Comiskey, and two pastors supporting homosexuality.
There are many I'm sure, testimonies of gay converts. But Andy's one is certainly impressive. His ministry is to help those facing similar problem.
Unfortunately, I later learned that he and his wife converted to Roman Catholicism.
The other one is David Foster and his film: Such Were Some of You. I have not seen this yet. He stands against calling homosexuality being a natural/genetic phenomena. Thus, the preference in the use of "sexual orientation" rather than "sexual preference". And when confronted whether he was confused before, that he wasn't actually gay, Foster would respond something like: Would having sexual encounters with over 1000 men count?