I don't think redux-thunk is the simplest solution. There's really no need to add anything to redux to support asynchronous code. You can just pass the dispatch function around.

For example:

  async function getArticle(id, dispatch) {
    try {
      const res = await fetch(`/articles/${id}`);
      const text = await res.text();

      dispatch({ type: 'GET_ARTICLE_SUCCESS', id, text });
    } catch (err) {
      dispatch({ type: 'GET_ARTICLE_FAILURE', id, err });
    }
  }

In my opinion all this middleware business (thunk, saga, etc.) is trying to make redux do jobs it isn't supposed to be doing.