Is there a word for a full stack artist?

A complete artist:

4 : highly proficient

• a complete artist

(M-W)

From: New York Theater Review edited by Brook Stowe:

We as a group, as well as anyone working today in theater, or poetry and film, have always before us his genius as a model of a complete artist.

From: Complete Works: The Old Wives' Tale, How to Live on 24 Hours a Day, Riceyman ... By Arnold Bennett

Whatever may be Tourgeniev's general inferiority (and I do not admit it), he was a great artist and a complete artist.

A term that could be applied in this domain is constructed with the adjective "consummate"; therefore we'd say "a consummate artist" if we had to speak of an extremely skilled artist.

Because @Decapitated already suggested my first idea (now an answer), "polymath", this answer is about a nearly-synonymous two-word runner-up candidate.

Renaissance [wo]man:

The term Renaissance man or woman or polymath is used for a very clever person who is good at many different things. The idea comes from a time of history called the Renaissance which lasted from about 1400 to about 1600. One of the most famous people alive during this time was Leonardo da Vinci. He was most famous as a painter, but he was also a scientist, engineer and mathematician. Leonardo is called a "Renaissance man".[1] Another "Renaissance man" was Michelangelo, who was a sculptor, painter, architect and poet. (wikipedia.org)

According to Britannica.com, this person is (emphasis added)

also called Universal Man, Italian Uomo Universale, an ideal that developed in Renaissance Italy from the notion expressed by one of its most-accomplished representatives, Leon Battista Alberti (1404–72), that “a man can do all things if he will.”

Here is a use in the wild, a quote from the new yorker about a con artist:

Allen Wolfson was a Renaissance man, in his own way. Between 1999 and 2002, he was involved in the stock-market rise of at least seven companies. Freedom Surf made wet suits and surf apparel. Learner’s World ran a day-care center. Stem Genetics did stem-cell research. Rollerball International made inline skates. Hytk produced and transported natural gas. The only thing connecting these companies was Allen Wolfson—that, and the fact that they were scams.

I think the domain of comics and graphic novels is a good parallel to software development, because the production of comics has traditionally been divided up into several distinct roles: the writer, the artist (which is often subdivided into penciller, inker, and colourist), and the letterer.

Wikipedia notes that when one person is responsible for all aspects of a comic they are often called a "comic book creator", "comics creator" or "graphic narrator".

One phrase that is often used is "triple threat":

an expert in three different fields or in three different skills in the same field.

A particularly common use of this phrase is applied to performers who can sing, dance, and act.

While "triple threat" is the most common construction of this phrase, "quadruple threat" isn't unheard of and there's no reason why this couldn't be expanded upwards.