Do you have an example of a beautiful language that adopted due to vendor stance? I cannot call C# beautiful. Perhaps Swift?
I would say C# was quite beautiful in 2001.
And yes, Swift as well.
Kotlin might eventually be another one, depending how the Java story will evolve past Java 8 on Android.
I don't know about vendor stance, but Elixir feels fairly elegant (better descriptive word than beautiful, I think.)
The languages with higher success rate are the ones that build on existing code and practices.
Every language with major market adoption is an inconsistent unless one does a language reboot Perl 6/Python 3 style and is willing to push it forward.