Moraine Lake should be at the top of your list of places to visit.

Yes, at the top, before Lake Louise!

No worries, it is actually now a combo, as you need to take a shuttle to both.

Moraine Lake has this iconic blue color with mountain background called the Valley of Ten Peaks.

Hike up the Rock Pile for the best view. There is a well maintained path to get there, don't climb on the rocks to get to the top.

Also there is a path along the lake that will take you to a small cascade.

You can canoe on the lake. Fees apply, of course.

Shuttle booking is highly recommended. Visiting Lake Louise and Moraine Lake - Banff National Park (canada.ca)