Merging table visuals with different filters for each row

OK.
so here what you can do. Hope you already have different measures for those values. If not then create like below

Unknown DoB Measure = calculate(count(table, person ID), DoB=blank())

Unknown Postcode Measure = calculate(count(table, person ID), post code=blank())
and so on.

Now you need to create a table named Query from Tab>enter data, put column name as Query and then enter all those caregories like "Unknown DoB","Unknown Postcode" ...... in that column and then load.

finally create a measure to switch
tabular values measure=

switch(true(),

max(Query,Query)="Unknown DoB", Unknown DoB Measure,

max(Query,Query)="Unknown Postcode",Unknown Postcode Measure)

now create matrix , put the Query column in the row and the tabular values measure in the value pane. you will get the  desired output.