#1 Christian Eriksen
Christian Eriksen has definitely been one of the top 3 midfielders in the Premier League for the last two seasons. Though he may not be a like-for-like replacement for Paulinho, he certainly is the kind of player who can take his place in the Barcelona squad.
Without Iniesta, Barcelona needs a player who can do the job of both their departed midfielders and Eriksen fits the bill perfectly. The Danish international scored 10 goals and assisted 11 more for Tottenham Hotspur last season.
He has also made 1.4 tackles and created 2.6 chances per game in the Premier League last season. His passing abilities, vision, and ability to read the game will certainly help the Catalan side. He could turn Barcelona into a real force.