I would go with JD Vance.
NO! Vance talks a good game, but he will be another Portman if gets elected. He has NO record, no experience in government, so he will necessarily as much a puppet of the GOPe as Biden is of Teh Halfrican.
Now trying desperately to hide his venomous anti-Trump tweets and his support for Hillary in 2016
https://www.thedailybeast.com/jd-vance-deleted-his-anti-trump-tweets-he-forgot-his-likes
Mandel did very well as Ohio State Treasurer, and will be a voice for fiscal sanity in the Senate.