How to Find Users in Oracle and Excluding Oracle Default Users

SQL> select username from dba_users where username not in
  ('ANONYMOUS'
  ,'APEX_040200'
  ,'APEX_PUBLIC_USER'
  ,'APPQOSSYS'
  ,'AUDSYS'
  ,'BI'
  ,'CTXSYS'
  ,'DBSNMP'
  ,'DIP'
  ,'DVF'
  ,'DVSYS'
  ,'EXFSYS'
  ,'FLOWS_FILES'
  ,'GSMADMIN_INTERNAL'
  ,'GSMCATUSER'
  ,'GSMUSER'
  ,'HR'
  ,'IX'
  ,'LBACSYS'
  ,'MDDATA'
  ,'MDSYS'
  ,'OE'
  ,'ORACLE_OCM'
  ,'ORDDATA'
  ,'ORDPLUGINS'
  ,'ORDSYS'
  ,'OUTLN'
  ,'PM'
  ,'SCOTT'
  ,'SH'
  ,'SI_INFORMTN_SCHEMA'
  ,'SPATIAL_CSW_ADMIN_USR'
  ,'SPATIAL_WFS_ADMIN_USR'
  ,'SYS'
  ,'SYSBACKUP'
  ,'SYSDG'
  ,'SYSKM'
  ,'SYSTEM'
  ,'WMSYS'
  ,'XDB'
  ,'SYSMAN'
  ,'RMAN'
  ,'RMAN_BACKUP'
  ,'OWBSYS'
  ,'OWBSYS_AUDIT'
  ,'APEX_030200'
  ,'MGMT_VIEW'
  ,'OJVMSYS'
  ,'OLAPSYS'
  ,'XS$NULL'
  );

USERNAME
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SAM
JOHN
TOM
CATHY