The 92 gang have been total and utter failures from Man Utd's side. I've seen glimpses of Giggs perhaps having a clue, but he's too busy battering woman to give it a proper go. Gary Neville honestly could be a top manager for all we know, but he went for that Valencia job which was a terrible, terrible idea and it's ****ed his entire career potential.
From Liverpool, most went straight into media. That 90s era gang weren't serious people though, they were always slated for such in the media at the time, people have just forgotten. Turning up to the FA Cup final in bright white suits, Fowler's sniffin' coke celebration, that sort of stuff. They were never ever manager material.
Lots of people forget about Dalglish though, who for a spell was probably one of the top rated coaches in Britain. He won a few titles with Liverpool and then built an outstanding team at Blackburn that eventually won the league. After that? One turd spell at Newcastle and his entire career was finished as a manager.