The 4 you mentioned are the most common arts for potential MMA athletes. As long as you put the effort into the arts you should be fine.

It may very well be a good combo but if you really wanna achieve success I'd lean towards the Tenderizers from deadrising 2 just duct tape nails to some MMA gloves and you're all set

I would stick to doing Muay Thai and BJJ, but yeah that's a good combo also.

Well I do yaw yan and Bjj for the ring, while I do eskrima for the street

Xiang almost sounds like KW

I want to fight in MMA competitions, and maybe even go pro and make a career out of it someday. Currently I'm doing Judo 3x a week (being doing it only a few months) and I'm searching for a boxing gym for striking. I want those to be my two main fighting styles and then learn some muay thai and bjj as secondary ones. Is this a good combo?