<div class="block block-leaderboard-scores block-leaderboard-top-scores">
  <div class="block-title">Winners</div>
  <div class="block-content">
    <table border="0" cellpadding="0" cellspacing="0">
      {% for winner in winners %}
      <tr>
        <td class="leaderboard-top-color-block blue"><img src="/soc/content/{{ app_version }}/images/gci/avatars/{{ winner.avatarPrefix }}/{{ winner.avatarName }}"></img></td>
        <td class="leaderboard-top-name">{{ winner.profile.name|escape }}</td>
        <td class="leaderboard-top-organization">{{ winner.organization.name|escape }}</td>
      </tr>
      {% endfor %}
    </table>
  </div>
</div>

<div class="block block-leaderboard-scores block-leaderboard-top-scores">
  <div class="block-title">Winners</div>
  <div class="block-content">
    <table border="0" cellpadding="0" cellspacing="0">
      {% for winner in winners %}
      <tr>
        <td class="leaderboard-top-color-block blue"><img src="/soc/content/{{ app_version }}/images/gci/avatars/{{ winner.avatarPrefix }}/{{ winner.avatarName }}"></img></td>
        <td class="leaderboard-top-name">{{ winner.profile.public_name|escape }}</td>
        <td class="leaderboard-top-organization">{{ winner.organization.name|escape }}</td>
      </tr>
      {% endfor %}
    </table>
  </div>
</div>

Use profile.public_name instead of the name() method to display winners name in the list.
Use profile.public_name instead of the name() method to display winners name in the list.
