The Estonian PM would excel anywhere she is placed, she is the real deal. NATO does need a good head, and in the conditions, the incumbent has done a remarkable job. He has been balancing the threats of a megalomaniac armed with nukes, and ensuring a country in need of defence gets what can be got. The most remarkable thing has been that the politicians in the west have exceeded the dire expectations handily, some have done commendable work, and some have done exceptional work. Of course, there is also the dude in Hungary... and there is the politicisation by Turkey of defence matters mixed up with internal security matters.
Without the political will, there is no munitions, without munitions there is a larger unpleasantness.