What I wonder is that you assume this
1. If Jesus was angry then he can't be the good god
2. the heretics had a 'good god' - even the Alexandrian 'Church Fathers'
3. Philo divided the godhead into a 'good god' essentially and a 'just god'
4. there is evidence of carry over from Philo in the Alexandrian Church Fathers
5. the myth or fable or story or whatever you want to call it came from Philo to Christianity.
6. while Philo didn't know the gospel he preserved the same building blocks presumably that Mark used to build his gospel
7. there is a common Alexandrian connection between Philo and Mark and the Church Fathers at least attest to the overlap (i.e. Mark's monasteries in Egypt were the Therapeutae)
8. while the controversies in the late second century were varied one strong bone of contention which emerges by the third century and down through Nicaea and beyond is the difference between 'Son' and 'Father.' By the time of the Nicene orthodoxy a pronounced effort was made to effective neuter the question with questionable use of language. On the one hand the Alexandrian tradition seemed to recognize and emphasize the inferiority (subordination) of the Son. Efforts from outside of Alexandria wanted to prevent or obscure this knowledge. Back in the late second century the question of whether the Father was on the Cross is intimately connected with the 'who is the good god' the Father or Son discussion we are having.
Admittedly the evidence gets more questionable as we go down the list. But when you read the writings of the Church Father there is this common interest in the 'good god' among the heretics. That's why they all take such interest in Mark chapter 10's - 'no one is good but the Father' - which seems to imply (a) a common use of Mark and (b) the idea that Jesus wasn't the good god.
I think the Church Fathers are telling us about different sides of a hidden tradition:
The people talking about 'the good god' who is a stranger or unknown to the Jews is (according to the metaphor) the feet of the elephant. The people talking about the Father suffering on the Cross the trunk. And so on. There was a common understanding ultimately where the Father was the good god and Jesus was someone else - presumably the just god for lack of a better guess.
“Finally, from so little sleeping and so much reading, his brain dried up and he went completely out of his mind.”
― Miguel de Cervantes Saavedra, Don Quixote