I think Haze could be added to the list of the best groupfighting leaders. He invented some groupfighting tactics that are still used today.
Never had any insight into his leadership, have only heard him speak once. Only french leadership i have experienced is possibly Dren / Tardet.
In term of group fighting tactics, I'd say Haze is definitely the guy who put most of the work these past two years to come up with innovative stuff. Not necessarily looking only at 5v5/7v7 results with the group fighting teams of his but for instance, he was one of the huge reason why the 85e did so good in the Season 4 RGL. Even if the credits for the 'final' against the 17e have to go mostly to Maharbaal and Dren in term of leadership, Haze did most of the heavy lifting in the early season, building-up the line-up, testing people at different roles and bringing together the best of the French competitive scene for this season. Can't speak for the NWWC as I wasn't there but it's also undeniable he had a huge impact in the two victories of France.
I'm curious to know in which instance you have experienced Dren and I's leadership? Was it during the 85e time? Because that's pretty much the only time where we both had leadership responsibilities yet our performances in 1v1s LB after the RGL were pretty average not to say mediocre so I can understand why it wouldn't have 'marked' your memory in any specific way. Dren isn't a born leader but he can very easily step-up to the job whenever it's needed, he has insane game-sense and always tries to keep things simple. His mental fortitude his quite something, he never gets angry in adversity and never put the blame on people in an unnecessary way.
As for myself, I've never shined as a leader and never will (at least on Warband). I am more of a paperwork guy, I am talented at organising a regiment and keeping the moral high but I've never enjoyed leading people or reflecting on the tactical aspect of NW, especially in the latest years of my active time.
Good idea btw, its at least a bit more original than the numerous melee lists we already have and it's always interesting to see the input you brought with your mentions. I would let that kind of stuff (melee lists) to other people, imo there is just so much more you can focus like the most influential people, more dedicated, or just listing people the people who marked you other the years in a specific way like you did for the NW leaders.