display user data from a group on the front end like a roster for the group lead

Is there a way to display user profile data in chart form for a group leader to know who all is in their group on the front end of the site?

If this is possible is there a way that they can manipulate certain drop-downs or text fields, such as add positions achieved or grades?

I have all the developer add-ons available to use.

Is there a way to display user profile data in chart form for a group leader to know who all is in their group on the front end of the site?

Chart? No, not without you implementing something of the sort. The template file for group users is as follows.

/components/com_comprofiler/plugin/user/plug_cbgroupjive/templates/default/users.php

Do not modify the default though as you will lose changes when you update. Make a new folder in /templates then copy users.php to it and begin editing it there. You can then select your template from within GJs configuration.

If this is possible is there a way that they can manipulate certain drop-downs or text fields, such as add positions achieved or grades?

I suppose if you implement that, yes, but out of the box no there is no such usage.

Would the add-ons allow you to accomplish something like this without coding or do the add-ons on work with back end functions?

No, you'd have to entirely code this your self.