PAA: Yes. The Ralbag held what he held and was widely condemned for it. He said something similar to the Rambam (that the Rambam also got condemned for at the time) and took it even farther. I’m not saying that his Shittah wouldn’t be Apikorsus for any of us to say, but he certainly said it.
yie: Yosifon (Josippon) was written wholely in Biblical Hebrew, which is part of its intrigue. It claims to be written by Josephus but is most likely a later pseudopigrapha. I am not holding in whether the Rishonim mean this Sefer when they quote “Yosifon” or they are actually referring to Josephus’ other works.