I would have thought that Edge would probably induct Beth given that they are married. Teddy Long I'd guess that Ron Simmons would be obvious one to do it given that Teddy managed Doom featuring Ron in WCW and with Teddy being this year's BAME entrant then it makes sense for Ron to do inductions.
Rock N'Roll Express is a harder one given that they never really worked for WWE. Jim Cornette is the logical guy but given his history with WWE would they allow him an open mic at an event like that also he has been very disparaging about Kevin Dunn in recent years so I'd guess Kevin may not want him to do it. A lot could depend on whether Trips pushes for Cornette as I don't think the Express would be in a strong bargaining position about who'd induct them. There are WWE employees like Arn Anderson who feuded with the Express, Paul Ellering whose Road Warriors were classic opponents for the Express or even Booker T who used the Express for his promotion in recent years.