Hi There, I can help in creating the required LoD expressions and making it dynamic by giving you the option of dynamically selecting the 'Top N'.
About me: I've 11 years of experience in Data warehousing and Business Intelligence field using Tableau, MicroStrategy as visualization tools along with Excel, CSV, MySQL, Oracle, DB2 etc databases.
I've developed various types of visualizations which are simple yet powerful tools for getting the insight of the business through data. These data come either from a single data source or multiple data sources.
Please do visit my Profile/Portfolio to get a feel of my developed dashboards in Tableau.
(https://www.freelancer.com/u/ashueureka.html)
Please let me know if you need further details.
Thanks!
Ashish