If you want Lae’zel in melee and specifically not GWM, I’d lean sword-and-board Battle Master over dual wield.
Reason is simple: without GWM, Fighter damage drops anyway, so DW doesn’t gain as much as people expect unless you build heavily around it. Meanwhile shield + Battle Master gives you a sturdier frontliner, which your party seems to want, and maneuvers still keep her impactful with control/disruption.
