Draftsman, at times

• Sign painter, at times
• Sign painter
• Calligrapher
• Sign printer
• Sign maker
• Stencil user, perhaps

Wikipedia Word definitions in Wikipedia
A letterer is a member of a team of comic book creators responsible for drawing the comic book's text. The letterer's use of typefaces , calligraphy , letter size, and layout all contribute to the impact of the comic. The letterer crafts the comic's "display ...

WordNet Word definitions in WordNet
n. a painter of letters

Wiktionary Word definitions in Wiktionary
n. 1 A person who is professionally employed to add writing to something (as a sign, shop window, etc.) 2 A particular profession in the production of comics, an artist specializing in neatly writing written material such as dialogue. 3 A device for printing ...