There are alot of great users i will love to nominate but you said we are allowed to nominate just one person,well i will nominate my favourite which is @onealfa.pob i see that him curating alot of good posts on this platform,infact i noticed that he curates more than 70% of posts which i see on this platform..i believe his curating activities is making authors to feel appreciated and thus making the platform to grow....