Rand Paul did. He's been the major person going after Fauci. But yes, I do agree that the vast majority of Republicans do nothing their base want.
Start doing actual get out the vote organizing, and even more important, community organizing. The job is more than show up once every two years. Scott Pressler is the only one on the republican side actually seeming to do this, and his extensive work in Florida and NY points out the value of it. It requires a ton of individuals just going around talking to people about issues they care about, and getting them to sign up to vote.