How to get top 10 user is based on user meta value

I’m trying to get top 10 users in my wordpress blog based on user meta value.

I’ve tried few methods & finally able to get just top one user using below wpdb query. But clueless, how we can get top 10 users.

$top10alltime = $wpdb->get_row( "SELECT MAX( CAST( meta_value AS UNSIGNED ) ) AS top_user FROM $wpdb->usermeta WHERE meta_key = 'alltimeusers'" ); 

echo $top10alltime->top_user;

Is $wpdb is right for this purpose? Or is there any other solution to get this done? using WP_User_Query?

I’ve tried something with WP_User_Query.

foreach ( $users as $var => $order ) {
$query->query(
    array(
        'count_total' => false,
        'meta_key' => 'todayuserclicks',
        'orderby' => 'meta_value',
        'fields' => 'ID',
        'number' => 10,
        'order' => $order,
    )
);

I can’t get this done after this .. how can we do this?

I guess you can do with get_users, something like:

$topusers = get_users( array (
    'meta_key'     => 'todayuserclicks',
    'meta_value'   => '',
    'meta_compare' => '!=',
    'orderby'      => 'meta_value',
    'order'        => 'DESC',
    'number'       => '10',
) );