Is Mousasi the best MMA boxer of all time?

So I argue to be the best MMA boxer of all time, you need to have the highest combined score of four criterias

1) Actual success in MMA
2) Actual success UTILIZING boxing in MMA offensively
3) Actual success utilizing boxing in MMA defensively.
4) Actual boxing background

So, though I don't agree, if Anderson Silva was a good boxer, he doesn't have any boxing background other than a whooping 1-1 record. On the other hand, Maldonado has a great boxing record on paper, but he doesn't seem to...

Is Mousasi the best MMA boxer of all time?