Who are 'We'? I Really Want to Know

The title is adapted from a song by The Who.

In so many passages we come across 'we', which Muslims will often take to signify Allah. But who or what is/are the subject below?

S 19:63 That is the Jannah, which we make our slaves inherit, those who were fearing.

Immediately after that we read in verse 64 And we do not descend except by your lord’s command. His is what is in front of us and what is behind us and what is between that. And your lord was not oblivion.

If 'we' and 'us' in verse 64 refer to angels, do they make their slaves inherit 'the' Jannah?

There is a lack of clarity in the 'clear' book.

Further reading:

Plural Nouns and Allah

Jannah Passages

Some Thoughts on Al-Jannah