Whats with all these insecure fans lately.
Its funny because these same people were saying Tobirama > Sasuke back when he showed Sasuke his rape face.
Anyway there are certain things not right in your OP.
Its true Minato disposed of fodders like nothing with little help, but defeating fodders isn't much of a feat when you think about the amount of shinobi's that have done the same or more.
Chiyo solo'ed a castle
Sasuke before he absorbed oro solo'ed a army
Sandaime raikage fought for 3 days and solo'ed shit loads.
Sasori solo'ed a fecking country.
I believe you underestimate Tobirama.
Tobirama is a sensor. One of the abilities of sensor's is that judging by the opponent's chakra they can determine how strong they are. Pein did something similar using Ukojizai to state that the intruder (Jiraiya) was something special.
Those 20 bounty hunters must have been very special to cause Tobirama to panic and instead of fight them head on with his team decided to be the sacrificial lamb because i guess he saw that, they will all be eliminated so he protected the younger generation from such a faith.
Those bounty hunters could easily be kakuzu level another bounty hunter and who can really defeat 20 kakuzu's by themselves?.
Also the kin/gin bro's are severely underrated, i am actually thinking whether i need to make a thread to explain their powers. Both jiraiya/orochimaru both got pummeled by 4 tailed naruto. While not saying the bro's durability or power rivals that of 4 tailed naruto i am sure its pretty close. Add those sacred weapons which without knowledge its rigged AF.
Its a feat that Tobirama wasn't killed actually.
Besides its Tobirama's jutsu that allowed minato that alias.
And btw the uchiha clan had that alias before Minato