I think, if the good support for researcher and all what researcher needs is available or can be provided easily this may be excellent choice. I think some universities in USA belong to this description.
The Nordic countries are a region of countries which has very good universities, combined with world-leading social security, high life expectancy - and no War since 1945 (in Sweden none since 1814). Their are plenty of scholarships, too.
I had to change my response a couple of times before I came to a conclusion. Firstly, In my context it means you are studying part-time and working full time. So I would agree with Prof Didibhuku Thwala that it s about the good supervisor and funding. And then the country issue has no bearing anymore, followed by individual preference.
Considering all the factors that you mentioned, the best countries for graduates seeking work are Australia, Germany, Canada etc. but keep in mind that it depends that where you will find a position and prospective supervisor.
From a social security standpoint, the Nordic countries are often heralded as being the best in the world. One should look at those, as well as whether there are jobs to be had that you would like to have, and the environment at the workplace. Is the head of the department a decent person? Will you be paid even if you are sick? There are indeed many questions that one could ask.
Dear Milad Baghalzadeh Shishehgarkhaneh for several obvious reasons it doesn't make sense to suggest to you universities in the USA (see also website cited below). As Michael Patriksson mentioned, I would choose a country which has a functioning healthcare system, particularly during the current corona pandemic.