This methods are used for Get Same Role and Subordinate Users.

public static Set<ID> getSameRoleSubordinateUsers()
     {
         Set<ID> userIds = new Set<ID>();
     
        // get current user's role id
          Map<Id,User> users = new Map<Id, User>([Select Id, Name From User where UserRoleId=:userinfo.getuserroleid()]);
          userIds.addAll(users.keySet());
         
        // get all of the roles underneath the user
         Set<Id> allSubRoleIds = getAllSubRoleIds(new Set<ID>{userinfo.getuserroleid()});
        
        // get all of the ids for the users in those roles
         Map<Id,User> subUsers = new Map<Id, User>([Select Id, Name From User where
          UserRoleId IN :allSubRoleIds]);
         
          userIds.addAll(Subusers.keySet());
      
        // return the ids as a set so you can do what you want with them
         return userIds;
    }

   private static Set<ID> getAllSubRoleIds(Set<ID> roleIds)
   {

        Set<ID> currentRoleIds = new Set<ID>();
    
        // get all of the roles underneath the passed roles
        for(UserRole userRole :[select Id from UserRole where ParentRoleId IN :roleIds AND ParentRoleID != null])
    
        currentRoleIds.add(userRole.Id);
    
        // go fetch some more rolls!
        if(currentRoleIds.size() > 0)

          currentRoleIds.addAll(getAllSubRoleIds(currentRoleIds));
    
        return currentRoleIds;

    }

Thank's 
Ramakrishnan Ayyanar
+919944112175