I am a tanker who’s unit doesn't currently have tanks.So my unit is encouraging me to attend a school. What schools should I consider?

You give very little information for a helpful answer. You no longer have tanks so what do you have? I f you do not have tanks then your no longer Armor. What is the units new designation. Are you Army reserve, NG or what? Sounds like you need to change MOS to suit the units New designation if that is the case then you pick a school that fits the needs of the unit. I don't know why every one wants to hide the real information then expect folks to understand. If it was me and the unit is paying for it the first course that i would take is a class in written communication.
Contact your career counselor or COC ask them for advice as to what career field that would benifit you and the unit. JMTC

armor crew member school to start

Depends on your path dude. Do you want to stay in the military? Try looking into the medical core if the school is not to far from your wife and family. Otherwise just consider classes at your local college

Project Management is universally transferable across military industry and commerce.

Regardless what training you get, be sure to pick up documentation of training and maybe some sort of transferable certification. Keeping your future in mind is important your end of service comes quick and the civilian world is waiting for your strength and character. Some transferable training would be nice too.

I am not sure what rank you are but if you are not an NCO yet You may consider going to turret mechanic or hull mechanic school if they will let you reclass. (AIT). You could always request to go back to 19K later?
Just an idea.

As a retired Navy Senior Chief, I'd suggest that PFC Shaw look into an. electronics program. There are always radios, radar sets, etc. that are failing their start-up tests and need to be repaired. He would also be in the right path for a good electronics / com[puter job when he retires or gets out of the Army.

Go for Medics training

Where are your tanks?

You might consider helicopter maintenance or commo school.

I would look into medic