I'm not gonna say JBL should be at the front of the line but he's done way more than some others who are already in there. A great career in tag team and singles ranks, as well as a solid broadcasting career. He has the credentials.
To me, I don't really care that much about the order that people go in. I think the one thing I do care about is that they induct people who are worthy while they're still alive to receive the induction. So in that case, there are some guys like Rick Martel, Sid Vicious, Lex Luger and Demolition that I think need to be inducted sooner rather than later. But you'd have to be a pretty serious JBL hater to try and deny that he has a Hall of Fame resume.