Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE complaints ( staff_id VARCHAR )
TABLE: CREATE TABLE staff ( first_name VARCHAR, staff_id VARCHAR )

### Question ###
What is first names of the top 5 staff who have handled the greatest number of complaints?

### Accurate SQL ###

SELECT t1.first_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id = t2.staff_id GROUP BY t2.staff_id ORDER BY COUNT(*) LIMIT 5