Another Prime Minister Couldn't negotiate a better Brexit deal.
... Apart from maybe the Norway option, which involves staying in the Single Market and customs union.
Yanis Varoufakis, an ex Greek finance minister and economics professor, who knows about negotiating with the EU:
https://inews.co.uk/news/politics/brexit-deal-news-yanis-varoufakis-bbc-newsnight/
More details about why its wrong to expect another leader to negotiate a fantasy Brexit:
http://chrisgreybrexitblog.blogspot.com/2018/11/reflections-on-political-declaration.html?m=1
Yanis Varoufakis, an ex Greek finance minister and economics professor, who knows about negotiating with the EU:
https://inews.co.uk/news/politics/brexit-deal-news-yanis-varoufakis-bbc-newsnight/
More details about why its wrong to expect another leader to negotiate a fantasy Brexit:
http://chrisgreybrexitblog.blogspot.com/2018/11/reflections-on-political-declaration.html?m=1