Really any company COULD hire a foreigner if they really want to but most find it unnecessary as they can usually find a local to do the same job without all the visa hassle. Instead of thinking of what companies would hire a foreigner, I would think about what type of job you would like and what skills you have and then apply to jobs and companies that match.
Some questions for you:
What type of job are you looking for? You are looking for a job at Ezeiza?
Any useful skill sets / training / education?
Do you have an advanced level of Spanish?
How stable are you in Buenos Aires? How long have you lived here?
These answers will help provide some recommendations from this forum.