Different tiers different flavors?

I'm thinking we'll just do a simple vanilla, or possibly marble for the best of both worlds and vanilla icing. That's if we do the 2 tier. If we have a 3, I want the top to be red velvet (my favorite and would match our wedding colors, lol), and I may do vanilla on the bottom with chocolate in the middle. The icing will have to be vanilla because of how we want the cake decorated. (See attached image)

We have 3 tiers and 3 flavors plus dessert bar and a grooms cake. There will be plenty of options.

I'm doing alternating flavors. I wanted the white/vanilla. He wanted the strawberry. Lol

We're having 3 tiers but 2 flavors (white with buttercream icing and fresh strawberries and chocolate with Irish cream filling) and a sheet cake of chocolate with Irish cream (it's so good omg)

What flavors?