Graphical and Frames 3/4: Cinzel and Adobe Ming for branding, some font from the Oldschool PC Pack for UI
Frames 5/6: Adobe Jenson Pro, likely Times New Roman or System for the UI fonts
Frames '95-99SE: versions of Helvetica for branding, Arial for UI text (99 uses Arial and Trebuchet MS)
Frames '02-04: Libre Franklin for branding, Trebuchet MS and an undecided font for the UI (changed to Futura for elements of branding and most UI text in '04)
Frames '04-Opal: Futura and variations
Frames Sapphire-Copper: Mulish and variations
Frames Emerald-Crystal: variations of Ryo Gothic Plus

Haven't done the UI for 99% of them (and as for some of them it's just a little box that happens to use the system's default font), so the UI font on these are likely to change. The branding's final though, of course.