Typically, a "Never Trumper" is a neo-con.
During the primaries and much of the general election campaign, Fox was totally in the tank for Trump. Whenever he spoke, they pre-empted programming to carry every word. Other candidates could barely get brief interviews. Several of the personalities were or are complete Trumpkins.
And no, many if not most of those you deride as Never Trumpers are anything but neocons. But the Ever Trumpers attack anyone who criticizes President Trump on anything — even such things as throwing his weight behind the horrid AHCA — as a “Never Trumper” — despite the fact that man (if not most) of them wound up supporting Trump.