Definitely. There are other priorities but we shouldn't be only signing 2-3 players this window .. and I think Conte would like 2 left sided centre backs in the squad for the start of the next season, especially when we're in Europe.
In order of priority: RWB, CM, LWB, LCB, versatile attacker.
and don't forget a back up goalkeeper to replace Gollini - and two of the players really need to be HG as we are short of HG players, so one could/should be the back up GK.
So a total of 6 players in - probably as many as we could realistically hope for.