NK has some qualities that none of the others have so he does appeal imo the issue will be he needs to be more assured on the ball and tactically so those should be the criteria driving his loan club matchup .
one thing to keep in mind is he would very likely play right CD only from here on in as we look to have solved the left side CD so that eliminates the need to be exposed on the weaker side and also simplifies the passing role. That’s something eg CG and FH haven’t had to endure , it’s not easy .