Neither Elm nor Haskell are really ML-dialects though. They're more ML-adjacent. I honestly rarely have any issue with indentation in F# that isn't immediately fixable by some editor feedback. Even thinking about it, I can't think of any issues I have had at all with any consistency.

I think Lisp in the flavor of Common Lisp isn't so regular or consistent, but Scheme and Forth certainly are. I basically consider ML as a typed, indentation-sensitive Scheme, at least the way I think and program in them both.