There are several statements in the Gemara about Moshe Rabeinu being 10 amos (15 feet) tall, about twice as tall as Zhang Juncai in the picture above. While some of those statements can easily be interpreted allegorically, others are used in halachic contexts and do not appear possible to interpret allegorically (I know that Rav Moshe Shapiro does so, but it seems forced, and lacks basis in the Rishonim):
Rabbi Elazar said: One who transfers a load [from one domain to another] at a height of more than ten handbreadths above the ground, is liable (for violating Shabbos), for thus was the carrying done by the sons of Kehath. And how do we know that this was the way in which the sons of Kehath carried? As it is written, “…surrounding the Tabernacle and the Altar” (Numbers 3:26), comparing the Altar to the Tabernacle; just as the Tabernacle was ten cubits tall, so too the Altar was ten cubits tall… and it is written, “He spread the Tent over the Tabernacle,” and Rav said: “Our teacher Moses spread it out” – from here you learn that the height of the Levites was ten cubits. There is a tradition that any load that is carried with poles has one third above [the carriers’ shoulders] and two thirds below. We thus find that it was [carried] well above [ten handbreadths]. (Shabbos 92a)
In my book Sacred Monsters there is a chapter devoted to this problem, with a solution based on a machlokes in the Gemara regarding some of the assumptions in the aforementioned sugya. Meanwhile, are there any illustrated Haggados that depict Moshe or Aharon in the Mishkan as being 15 feet tall? And how do those that depict them as being normal height deal with these statements in the Gemara? My feeling is that when it comes to actually visualizing such things, many people suddenly find themselves possessing latent rationalist tendencies.