Jarvis has always had the tougher job - looking after a dozen-plus super-powered heroes at any time, shopping for Hercules feasts, dealing with standard and cosmics invasions to the property grounds. Alfred has had one hostile visitor to deal with - Bane - and spends a lot of time doing oil changes on the hundred batmobiles in the cave, when he not putting bandages on Bruce. Soooo...for broader experience, I'm going with Jarvis!