At 1/300 scale the widths are all historically accurate. Its the footprint of the base that matters not necessarily the number of minis on that base. At the moment all the widths are historical and I always use paper strengths so French Infantry battalions are all 6 x companies of 120 and Cavalry regiments are 4 x squadrons of 120. When I replay a historical fight, I remove bases to get down to actual strengths on the day, anywhere from 300 to 600 for Waterloo for example.
Thanks for the input.
I am leaning towards 1 rank of minis for the cav but increasing the bases to 3 figures instead of 2.