Your rendering is off, because a tub would never be as tall as a vanity!

You have plenty of drawer space for each vanity, so losing a few inches from each side won't be the end of the world and will give the tub the space it needs.

We did a tub and separate shower in our master bathroom, but it is the only tub in the house, with the guest bathrooms having nice sized showers.

The arrangement looks out of balance -- as if you are lining up all your "furniture" along two walls. Do you have a sketch showing the room dimensions, doors, windows?

Everything looks squished together. Either lose the tub or the vanity and spread things out.

A freestanding tub crammed in the corner is a hot mess. How do you plan to clean around it?

After 20 years of remodeling bathrooms, I've found that every inch matters. If you already have a bathtub elsewhere in the home, I usually recommend prioritizing a layout that feels open and functional rather than forcing in a second tub. A well-designed walk-in shower often adds more daily value than a cramped tub. Moving the shower to the corner and opening up the space sounds like a smart decision. My advice is to leave enough breathing room around the vanity and use that area for custom cabinetry or a large plant to create a more balanced, spa-like feel. A bathroom should feel intentional—not like every fixture had to squeeze in.