Most major players are with the correct agents.
You need to start a new save for this to work. Compatible with the 18.3 winter update.
How to get real life agents in FM 2018Download the database and move the FM18 Real Life Agents (by pr0).fmf file to your editor data folder:
Documents/Sports Interactive/Football Manager 2018/editor data/
If the editor data folder doesn’t exist, you have to create it yourself.
Open FM18 and start a new career.
Now select the 18.3 database from the top right drop down menu and make sure this file is enabled.
This database is included in my FM18 Data Update pack. Stam requested to add this as a standalone file as well, because people who are not interested in custom transfer updates are unlikely to find it there.