It sounds like you have a really strong head start on your application!
First, given that your degree is in something unrelated to anthropology I'd double check the application requirements to make sure that the program doesn't require a BA or BS in anthropology or a related field. I have never really run into this issue and because your minor was in anthropology you should be good. Even so, it's good to double check.
I also don't think that having broad research interests limits you to only MA programs, especially since you have loads of experience. I'd recommend reading through stuff written by your POI and ask yourself about what's missing and where you could improve upon their work. Regardless of program type (MA or PhD), I think it is important to have a well thought out, contextualized plan of research in your statement of purpose, even if its not specific because you'll flesh it out even more as you go on in your graduate career.
Last, I personally hate the GRE and I think the only reason I could get away with my abysmal scores is because of my breadth of experience and high GPA. That said, if you feel like your overall GPA is weak, then retaking the GRE and scoring well in the quant section could offset it. According to other anthro graduate students, GRE is also super important but having a higher score can't hurt you.
Overall, I think that there are so many factors that play into admission decisions that it won't be one thing that gets you accepted or rejected. By strengthening your application in its entirety you definietly increase your odds.
I hope this helps! I'm not very good at giving advice so hopefully this is all clear!