I prefer Chow more than I do Angus, but Angus isn't too bad. My mom has Angus in her first town and he's actually pretty nice. Perhaps if you get him in your town and maybe give him a Chef's Outfit, it might just work really well.
I think Angus would fit better. Of course, choose whichever you personally think would fit better, but in my opinion Angus has more to do with food than Chow.
I'll vote for Chow because I have him in my town and I really like him. I also think he looks nice with the other villagers you have in your signature. Plus, if you have T Bone, that would make two bull villagers and I like variety. So those are my reasons, but it really depends on who you like more.
Of the options presented, I believe Chow should be chosen for similar reasons as LadyDestani stated--I like variety and having two bull villagers seems like overkill.
However, I really love Nunnafinga's suggestions too! Rasher especially, because if you have a bull for beef then a pig for pork makes sense.
And I hope it isn't awful to throw out another candidate for your food town...