Hi All,
Trying to compile of X-Men who have been field team leaders and welcome any updates:
Cyclops - original team lead
Storm - replaced Cyclops
Nightcrawler - replaced Storm and then replaced by Storm after the Mutant Massacre. Also let Excalibur
Wolverine - replaced Storm when Ororo left to try regain her powers
Banshee - X-Corporation (I think)
Jean Grey - ???
Havok - led team mission to Shiar space
Kitty Pryde - latest Gold Team leader
Jan 14, 2019 update: let's limit the list to Universe 616 X-teams directly affiliated with the Xavier/Jean Grey school and Utopia.
Adding to the list:
Rogue
Emma Frost (co-leader during Utopia)
Psylocke (X-Force)
Jubilee (Gen X teacher/leader)
Cannonball/Mirage (later incarnation of NM after they graduated)
I've always considered Xavier and Magneto as the headmaster/teacher type rather than field leader.