When it comes to vote diversification , meaning - number of unique authors upvoted - @onealfa.leo and @taskmaster4450le lead the chart .

If you want to encourage Engagement , I run an engagement project which upvotes top 25 authors everyday who engaged with quality comments. You can delegate to @amr008.leo ( not forcing though lol ) ,I give dividends every Sunday.

But really I suggest onealfa or taskmaster to follow 1st . You can delegate equally to both though , that's another option.