Love Better Than Immortality - He is the strong villain in the story but falls for the FL and finds himself losing his power to protect what he believes in along with the FL. (He ends up losing all his power in the end)
The Romance of Tiger and Rose - I suppose this counts? The ML first wanted to kill the FL and take over her nation but finds himself loving the FL and losing his 'power' (Was first evil but becomes pure)
Angel's Last Mission: Love - ML wants to return back to heaven and get his powers back. But first he is given the mission to make a cold ballerina believe in love again. He ends up falling for her and eventually loses his craving for wanting to go back to heaven for power.
Love and Redemption - Currently airing drama that has a ML who risks everything for the FL even though she does not love him in return (For 10 lifetimes lol). So well made, highly suggest!