Erlang/OTP but you are probably asking about the usability once you have 100+ developers working on a project so it doesn't quite fit in. Even Go is questionable here when compared to Java, C# and even C++.
Ada
COBOL ?
C# indeed. But even javascript has a bearable JIT nowadays. Also no need for the vague enterprisey connotation, only features and performance are needed, which e.g. scala provide and Go do not (feature wise).
Ohh and Swift! I just mean that lots of popular languages were historical accidents when it comes to their use on large scale projects and it’s pretty rare (I suppose less now it seems) for someone to go out and invent languages specifically for large scale repos and “toy language is retrofitted for scale” is a more common narrative.
Yes historically this has been true but we are past this time, no need for each new language to duplicate it VM, its JIT, its GC.. GraalVM solve it all and bring ecosystems interop.