Default filter

I have RLS implemented 

The issue is for a user with all Access , I do not want to illustrate a graph with all options , too busy 

My Solution is to idenify the min ID assocaited with the Filter , have a generic name "Default" ; regardless of the options avaialble , it will always illustrate Default option based on what the user has access to 

I am struggling with implemation Step 2 , assigning the min ID in the list with default ; the dax treats each value on there own merit versus returing the min ID from the list 

Example

Out of all countries the User only has access to the below (User depending this list is dynamic)

List 

1 Germany

2 Italy

3 France

4 USA 

5 China

Min Value here 1 : I want to assign Germany a Country name of , "Default"  and the other countries in the list the Country Name 

Step 1 : In realtime , based on options avaialbe return min ID so we can assign value of Default  

Step 2 : Assign min ID value Default 

Expected Result 

1 Default

2 Italy

3 France

4 USA 

5 China