There was a "Never Trump" movement of Republican leaders. It's dead.[1] By now, most of the Never Trumpers are either out of power or have groveled to Trump. The National Review, a conservative publication, wrote: "At no point did Never Trump possess the basic traits of a political movement: a small number of leaders and large number of followers." It was all leaders, or former leaders, or people who thought they should be leaders. The article says Never Trump was composed of "1) experts in foreign policy, economics, and law ... 2) campaign professionals ... and 3) public intellectuals ..." Not Republican governors and members of Congress. Not big donors. Those people only matter when they're in power. There are small conservative journals in which they still write. Few read them. They're not on Fox News.
It's not at all clear what the GOP looks like after Trump. The most likely Republican successors are said to be Vance, Rubio, and DeSantis. The last two have failed badly at presidential bids before.
[1] https://www.nationalreview.com/corner/the-end-of-never-trump...