Now looking at this I know you're thinking  "What the-?" So let me explain. Alfred has beat attacked by villains, monsters, ninjas, and Damian. 

better than jarvis

Alfred dealt with a teenage Batman. Props.

This is still one of my favorites:

" better than jarvis "

ALFRED IS DA MAN!!

I know It's not cannon but a friend told me he actually saved Batman in Batman Vs Predator crossover by shooting the Predator with a shotgun before it killed Bruce.  
Great forum!   
Also  what he has put up with  due to his "boys"
Bruce: basically raising and dealing with everything from the early days to now and not to mention romances
Dick: Hyper active Circus kid to Rebel Prodigal to Helping him with Damian and all his girl drama
Jason: Dealing with his anger and violent to death to return as crazed villain/anti-hero ] 
Tim: going from happy robin to moody robin to Somewhere in between Red Robin 
Damian: Shouldn't the name alone be a hint if you don't know him,Psychopathic kid to arrogant child
I Know I could be detailed and list more but this was just off the top of my head

Here is another reason. 

Alfred was a member of the infamous British SAS and later a Mercenary where he burned down a forest to kill on guy... and he punched Deathstroke in the face. Alfred is more BA than Batman in my opinion