That's a really great (but super difficult) question. There are a lot of things that come into play. Firstly, there's no "right" answer in the first place. There is no one single path from A to B. Success isn't a straight line for most folks. On top of that, things on paper can be different from what they are in reality. The best sounding jobs in the description can be absolutely terrible for personal happiness and professional development. The opposite can also be true. Same goes for well known companies for relatively smaller firms.
So what I will say is keep your eye on the longer term goal. So NOT on your masters. But what do you want to do AFTER your masters? Admissions for degree programs look at not only where you've been, but where you're heading and if it's realistic / ambitious. They bring recruiters to the program and you need to reflect positively on the program by being hireable. So think about what you want after you graduate and then work backwards. And don't just limit your thought process to titles and companies. Think about skills you'd develop and exposure you might have. Take, for example, folks moving from consulting to ibanking. The school and the internship will teach them about finance, but firms want a TYPE of employee. They're look for certain skills and characteristics.
I can't tell you with any certainty (and no one can, you'll have to make a gut call) which of those positions are best. However, choose the opportunity that gives you the most growth opportunities coupled with the widest exposure set possible. Ask yourself a very simple question: "where will I learn the most?" And that may not be the biggest company or the best title. But do what is best for you, and the admissions committees will respond to that.
I hope that helps!
Bhavik