So ... 4 senators and 2 representatives are not MAGA. Everyone else has had to swear fealty to Trump or leave. And you say that's diversity of opinion?
The list is not an exhaustive list of non-MAGA republicans, it is a list of non-MAGA republicans who publically opposed Trump's election even after he won the primary.
Non-MAGA republicans overall are about half the republican party.
This poll is a little old, but in 2023 only 38% of republicans identify as MAGA republicans
https://www.vanderbilt.edu/unity/2023/04/07/first-ever-vande...
And here's a list of prominent republicans who are not MAGA republicans:
https://en.wikipedia.org/wiki/List_of_Republicans_who_oppose...