Like i have repeatedly say lor. I appreciate GH for winning the 5 cups and CL qualification. However, i think that as far as man management is concerned, he has failed miserably. Yes, Sir Bobby's record in EPL is worse than GH and i agree to that. It's for everyone to see. However, is Sir Bobby a better manager to GH? Well, this is very subjective as Sir Bobby won league with Ipswich but that was years ago. He also won many cups and leagues with PSV and Barca so he has proven that he can win with different thing. I regard winning with different teams more highly than winning with 1 team. With 1 team, if your team is blessed with top class player, you shd win. With different teams, unless you are damn lucky, you have to be of some good to consistently win.
Is mourhino,fergie,arsene good? Yes, they won with different teams. Mourihno won with Porto, Chelsea (you can argue that Chelsea is so strong and shd win but what abt POrto?). Fergie won in scotland before winning with Man U. Arsene was a success in Japan, Monaco before he came to Arsenal.
Other successful mgr includes maybe Martin O'neil, winning at celtic is nothing to shout abt but what abt 2 league cup or issit FA cup with Leicester?
David O'Leary i won't treat him as successful as he only have 1 good season with Leeds, and spend so much money and subsequently unable to reproduce the success with both Leeds and Villa. Ranieri also not consider successful since he is unable to win with Chelsea despite the big budget.
These are some example of how i rate managers as successful or not. If GH can win with Lyon or any other teams (league, cup, european cup, uefa cup etc), i would say he's successful or good manager...
I will be the 1st to admit that when we won the 5 cups (in 2 seasons), we are pretty lucky in the FA cup and UEFA cup...