TypeScript has become my go-to general-purpose option. Between Node.js & the web you can build anything (and share code between all these different domains), the JS ecosystem is huge so there's existing libraries & examples for everything, it gives you a good balance between productivity & performance (much faster to run than Python, much faster to write than Rust), and proper typing solves the rough edges of JavaScript without being so strict that you have to fight it.

I work with Kotlin, Rust, and Bash for various other specific things (e.g. Android apps, very low-level/high-performance code, and widely-compatible scripting) but 9 times out of 10 I'd reach for TypeScript if there isn't a special reason.