Best migraine prophylactic you’ve tried?

I’ve struggled with severe migraines for a while and currently take sumatriptan as needed and daily magnesium. I tried amitriptyline, but it didn’t help and had intolerable side effects. I have an upcoming neurology appointment and want to try a preventive again, but I’d prefer something that doesn’t cause weight gain or depression. I’d appreciate hearing your experiences with daily medications.

Edit: THANK YOU ALL I LOVE THIS COMMUNITY!! I read every single comment and I’m really really appreciative.