How do I make the movable blocks in my game more in line with the tilemap?

I've been making a simple 2D puzzle platformer game for one of my first projects in Unity. I've recently gone over the movement code to make it a lot cleaner with less glitches. However, something slightly annoys me. I am able to push and pull blocks, but they aren't completely in line with the tile map.

When I first started making the game, I put a box collider on the box, and when trying to push it through a one-tile wide gap, it would get stuck. The blocks are the same exact size as a single ground tile. Shouldn't they fit? My temporary fix was to make the block colliders 0.9 in size in both their height and width. However, this resulted in my player getting stuck when they went on top of the block that was in a hole. My temporary fix to this was to add slants to the corners of the player's collider, so they would slide up any bumps they encountered. Here's an example... (Yes, yes, the buttons and gates are out of place but I'm going to fix that).

I want to fix this, as the blocks look slightly out of place, and the player always shakes when they go over these bumps where a block is right next to ground. Is there a way I can make the block the same size as a ground tile, therefore making my game look a little cleaner? Thank you for any help!