What are the assembly types with name <>c?

They're C#-compiler-generated types, e.g. for anonymous types, iterator blocks, closures that capture local variables, and async functions. This is nothing to do with Entity Framework in itself.

If you want to ignore all compiler-generated types, you can check whether the type has the [CompilerGenerated] attribute applied to it. If you want to do it just from the name, then see whether the name contains < or > - if it does, it's not a valid C# type name, and will have been autogenerated.