Glacier national park (the Canadian one) Banff/jasper Icefields parkway
All are spectacular, all are close to each other, and can be enjoyed from the vehicle/a short walk if thats your thing.
Depending on when you plan to travel, some roads/parking areas may be closed. They start to open in April, generally.
Five days is probably fine, especially if you aren't into hiking and just plan on driving.
That cheerleader song that was popular ten or so years ago. Worst thing that humanity has ever done.