Looking for an LMS recommendation...

The UX of the Articulate Rise lessons are ... the most beautiful/elegant lesson design I've ever seen. I'm now working on a new strategy that revolves around it.

The big question I'm trying to find an answer to (that maybe you can help with) is - I need a recommendation for an LMS that can support three things:

1) Import articulate lessons

2) Add users without email addresses

3) Allow "coaches" to see progress of the "athletes" through the content.

Re #2 - the problem is that we're teaching children who have phones but not email, so need either a link-based, or text-based sign-up flow.

If you can help at all, I would be eternally grateful!