I disagree strongly, this is actually more of an issue with lawmakers because working in the legislature is all about building political coalitions and cutting deals. Republicans’ political coalition since the 1960s has been economic conservatives (who I think are extremely misguided but I accept will likely be a part of any representative government) and klan members (who should never ever understand any circumstances ever be allowed anywhere near the levers of power). Even if Mitt Romney is a good person in the abstract, when he wants to get a bill gutting Social Security over the vote margin he’s going to be partnering with the Louis Gohmerts and Gym Jordans and MGTs of the world, who are going to expect something in return. Moreover, the Mitt Romneys of this world are capable of learning a lesson, and the lesson the electorate should teach them is that partnering with nazis and klan members leads to crushing political defeats.
There are no good Republicans for any elected office, period. Conservatives can spend a generation or two wandering in the woods asking themselves how they ended up where they did and come back with a new political party, but it’s about forty years past when the grand old one should’ve been thrown on the ash heap.