Here are macro stuff from Beta manual:
/target (/ta) ―PC name‖ (placeholder) Targets the specified target. Target must be within range for this command to function.
/targetnpc (/tnpc) Targets the closest NPC within a certain radius.
/targetenemy (/tenemy) Targets the closest enemy within a certain radius.
/battletarget (/bt) Targets the closest enemy within a certain radius that is attacking you.
/assist (/as) ―PC name‖ (placeholder) Targets the target of another PC or NPC. (A target must be specified.) Assists current target when not specified.

Here are some short-commands that you might find useful:
Cycle Through Enemies (Nearest to Farthest) Tab
Cycle Through Enemies (Farthest to Nearest) Shift+Tab
Face Target F
Target Self F1
Target Members in Party List F2 - F8
Target the Target of Your Current Target T
Target Current Focus Target F10
Target Nearest Enemy F11
Target Nearest NPC or Object F12
Set/Clear Focus Target Shift+F
Lock Camera On Target NUM5

I think it's the /ta "Sir evilbadguy" you are looking for. I personally use the function that is on F11 but have moved it to another key.