Assuming 28mm.
I have used lots of different brand figures. But have finally settled on Foundry, Perry, Eureka and a few special Front Rank figures.
Foundry:
Warrant British, Continentals, Uniform Militia, Artillery, mounted units and officers, Minute Men (non-uniform militia).
I use Warrant British for the NY/NJ and the Penn. campaigns.
Perry:
Basically what Foundry doesn't have. Hunting shirt infantry, Saratoga and Southern British, Germans, Cavalry, Queen's Rangers, French, Northern and Southern Militia. More mounted officers including German and French, Indians. Foundry and Perry complement one another.
Eureka:
They make ragged Americans, which I use anytime, any campaign. They are perfect for the New York/New Jersey campaign.
Front Rank:
They have a few figures no one else makes.
Warrant British – I used them for the NY/NJ and the Penn. campaigns.
Fife and Drum figures look great in pictures but I haven't bought any as of yet.