Rodney Beason
Oh, him.
This got hashed out earlier this year on FR, in a multi-hundred post thread. A little googling by one of the GRPL Borg revealed that Mr. Beason is a spiritual wanderer -- he's been a lot of different things.
Same article, even: From Calvinist to Catholic. And as that thread revealed, a few years later Rodney Beason converted to that scourge of Catholicism, Freemasonry, a short five years later - and was fooling around with Hinduism at the same time. There's your "powerful conversion story right there" - Beason perfectly embodies Ephesians 4:14:
Then we will no longer be infants, tossed back and forth by the waves, and blown here and there by every wind of teaching and by the cunning and craftiness of men in their deceitful scheming. Instead, speaking the truth in love, we will in all things grow up into him who is the Head, that is, Christ.
As Frumanchu stated on that earlier thread, "Any Reformed Protestant who believes there was no true church until the 16th century didn't pay much attention to the words of the Reformers and is likely letting their opposition to the teachings of the Roman Catholic Church lead them to throw the baby out with the bath water."
In summary, I think a post on that thread summarized Mr. Beason's "powerful conversion story" best:
"Will Convert For Food"