What beautiful illuminated Lombardic versals,
@Lucie Y - Here are a couple of design principles to consider:
I agree with
@Erica McPhee and
@jeanwilson that Foundational, Italic, and Ronde would go great with them, especially because the delicate pastel colors you used on those Rs fit in with a later (renaissance / early-modern) aesthetic. Note that highly pigmented, saturated colors (especially red or blue), reproduce a more medieval aesthetic, so you might find that filling in the versals with darker colors looks better with a denser and/or earlier script.
Basically Lombardic versals originate in the Early Gothic period, and last through the advent of Humanist type, so they'll basically look good with any blackletter / broad-edge script - from texturalis to bâtarde to italic to foundational. But you certainly do not have to be doctrinaire about matching the historical aesthetics. You might think about harmonizing the decorative elements and the script. Your lovely, airy vine and leaf decoration looped around the pastel versal suits a softer/more curvaceous, open script - like Ronde or Humanist. As
@jeanwilson says - match the airy look of your R's decoration with an airy script to preserve and enhance its airiness. A versal with a more angular and dense decorative motif (like English penwork or an art deco style sunburst) and/or a more saturated color scheme would look good with a denser, more angular script - like texturalis, fraktur, or bâtarde.
But really, your work here is so pretty that you could set practically any calligraphy script or even print/type next to it. It will improve everything it accompanies!
--yours truly, K