F# has pretty good IDE support, and type providers are really nice as code completion extensions. C++ has excellent IDE support in visual studio, note I'm including the debugger here also, as that is part of the experience!
Then there is objective C, Swift, Kotlin, Dart, Typescript, some versions of smalltalk. Many of those languages were designed specifically for IDE use (dart and typescript definitely).
Then there is objective C, Swift, Kotlin, Dart, Typescript, some versions of smalltalk. Many of those languages were designed specifically for IDE use (dart and typescript definitely).