Rashi sichos taught me to appreciate the depth of Rashi
This is a very important point. It is critical to learn Rashi on Chumash with a super commentary that brings out the depth of Rashi.
The Mizrachi, Maharal, and Livush are classics and their seforim are widely available. I wouldn’t try learning them all at the same time though. The Maharal is especially excellent but one has to get used to his unique writing style.