Thanks for the comments everyone! Drogo has tons of personality.
Last night however, that caused him problems.
Normally when I feed the tank, Max (the GATF) is content to stay at the bottom and wait for Drogo to finish eating. Last night, Max was especially hungry and tried to eat while Drogo was still eating. Drogo did NOT like this. Drogo bit the heck out of Max a time or two, which, ehhh, irritated Max.
Now, Max is about 10-11 inches long and Drogo is probably about 13" and a bit thicker. Drogo probably felt safe in running off the smaller tigerfish, but he had to learn an hard lesson. After Drogo bit Max, Max retreated to the bottom of the tank for a minute and composed himself. He then looked up at Drogo, aimed, and attacked Drogo. He grabbed Drogo by the tail while he was in the top left corner of the tank and literally drug him to the bottom right corner, released him and came back and hit him on the caudal peduncle one more time. He then went up to the top left (where the pellets tend to collect) again and ate all of the remaining pellets. Max then went down to the bottom right and started flaring at Drogo for a bit, then went back to ignoring him like usual.
The dynamic power of an angry GATF is truly impressive.
Drogo doesn't seem any worse for the wear, he's just missing some scales and his tail is in ribbons. He also gives Max plenty of space now. lol