#4 Thomas Tuchel
If West Ham wanted to make a statement of intent they should have gone and got the German who has an outstanding points per game rate of 1.71 and favours an offensive 4-3-3 formation. Tuchel has been linked with the Arsenal job frequently as he is very highly thought of, he's essentially a more rounded Jurgen Klopp.
His record speaks for itself, he steered Mainz into the Europa League when there are much bigger teams than them in the Bundesliga and he really showed his pedigree in his first victory, a 2-1 victory over a Bayern Munich side including Philipp Lahm, Bastian Schweinsteiger and much more.
Senior Games Managed: 290 | Wins: 141 | Draws: 65 | Defeats: 84
He signed off from his four seasons at Mainz, leaving them in the Europa League positions once again, saying: "I couldn’t see how we could reinvent ourselves once more the coming summer."
He took some time off but was then hired to replace Jurgen Klopp for the 2015/16 season. He won his first eleven games in all competitions, meaning that they qualified for the group stages of the Europa League. Overall his first season was considered a success, they finished runners-up to Bayern Munich, having finished 7th in Klopp's last season in charge. They also finished runners-up in the DFB Pokal, again to Bayern Munich and exited the Europa League in the Quarterfinals to Liverpool. Much better.
Last season, it was much of the same, however, this time they managed to win some silverware. They defeated their nemesis Bayern Munich in the semi-final of the Pokal and beat Eintracht Frankfurt in the final meaning as Tuchel got his hands on his first professional trophy. He departed just days after, following a difference of opinion with the board.
Tuchel would no doubt be keen to make a name for himself in English football and would have used West Ham as a stepping stone to one of the bigger clubs, but he would have brought a level of football that has not been seen at East London, for a long, long time.