Sorry, but you're delusional if you fantasize MAGA without Trump, or if you think Trump will lead any party other than Republicans.
The real issue is which Republican leaders are actively working against Trump, and he gave us his list.
Here is Trump's list, starting at 1:14:05 of his CPAC speech:
Trump was ridden out of town on a rail by the GOP. Trump, for the most part, is currently held incommunicado. He is able to reach a few thousand RSBN viewers. When he was president he had zero influence within the GOP but now, from his great position of power, he’s going to slap the GOP into line. You Uniparty (R) stooges do provide comic relief.