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Guy Steele, Rich Hickey, James Gosling, Kernighan and Ritchie, Guido Van Rossum, Bjarne Stroustrup.

Harder because the bar is really high.

Nickles Worth (or Niklaus Wirth if you prefer to call him by name rather than value).

Wasn't Stroustrup more a language designer than a compiler guy?

For compiler fans, that's a very incomplete list. I'm rusty but off the top of my head, I see you're missing Walter Bright and Terrence Parr.

Chris Pressey, Arthur Whitney, Chris Lattner...

Hejlsberg too (Turbo Pascal, C#, TypeScript).

There's probably hundreds of other brilliant engineers more with insane impacts that never got any popularity.