Ideal disk setup for MDFs, LDFs, TempDB, and cube files?

I'm about to build an enterprise SQL Server that will run both OLTP and our data warehouse (OLAP).  What is the proper disk setup for data files, please?  Is it something like:

• 1 for MDFs
• 1 for LDFs
• 1 for TempDB
• 1 for OLAP files

Or something close to that?

Thanks for any guidance.