Unilever, which is behind brands such as Ben &amp;amp;amp; Jerry&amp;#39;s, Knorr and Hellmann&amp;#39;s, is closing in on top spot on Oxfam&amp;#39;s scorecard. Oxfam says it &amp;quot;scores well on supporting small-scale farmers, workers rights, action on climate change and managing water usage.&amp;quot;