Good points. Cannot disagree with your list.
For Nelson, I would add an intangible, that during the early days of the war he showed that victories were attainable, the Royal Navy would do the job, and kept the morale up at home during the years of failure while the army learned it business.
I would also nominate William Pitt the Younger for his political opposition and keeping Britain in the game whatever flaws in his concept of military strategy and operations.
Another would be the Duke of Wellington not so much for Waterloo than for the same intangible as Nelson's, that is he produced victories and established the army's reputation with the people. Nothing motivates like victory.
Other possibilities are Metternich and Talleyrand. For Prussia, I am not certain if there is one person who stands out amongst the rest and here it maybe more of a group effort?