Daniel Jacobs is a big name in the sport but as of right now is known for losing close decisions to both Canelo and Golovkin. He does however have a good resume at middleweight and is a champion in his own right.
Currently his best win is Sergiy Derevyanchenko who while not being a world champion is a very good fighter who arguably beat Golovkin. I wouldn’t argue if people said Peter Quillin was his best win but i’d shade it to Derevyanchenko because of what he did after Jacobs beat him.
He currently holds wins over 5 former world champions though not all of them were champions at middleweight where he was campaigning. He has notable wins over Sergiy Derevyanchenko, Sergio Mora x2, Peter Quillin, Ishe Smith, Maciej Sulecki and Caleb Truax. This is a decent run of wins at middleweight but also not nearly enough to be in the hall of fame currently. He still lacks a marquee win that would really secure him a spot. His other notable fights at middleweight were versus Canelo Alvarez, Gennadiy Golovkin and Dmitry Pirog all of which he lost.
In his last fight he moved up to Super middleweight where he fought Julio Cesar Chavez Jr who is a good name but doesn’t really add anything to his resume at super middleweight especially with how seriously Jr takes the sport.
To be inducted into the hall of fame I think he needs to win a title at super middleweight and then needs to unify and also get himself a big win over someone like Canelo. He can’t really go on a long unbeaten run at super middle after winning a title because hes 33 and also clearly isn’t the number one guy in the division so it doesn’t mean as much. I think its quite hard to argue him being in the hall of fame even if he wins a title at super middleweight because he was never the number one guy at middleweight and lost to the three best fighters he faced. For me he has to prove himself to be the best at super middleweight for him to be considered for the hall of fame however I expect if he wins a title at 168 pounds he will get in due to him having big fights in America which is where most of the voters live.