Hmm, the beer dilemma, see depends on what you want to do, I've used bud/miller/corona/ect/ect on damn near everything....
Corona for seafood, with a shot of tequila always works wonder, especially with lime and salt
Steaks, depends on what you are doing... marinade or on the grill pouring... Marinade, go with a hefe, especially (name your hefe here). For over the pour... go with bud or something like that, better to spill cheap beer in my opinion.
Chili... PBR, in a glass bottle, no can allowed (yes I know they sell glass)
Chicken, not really a master with this one, but I'd go with a keystone, might as well... something lighter for a lighter meat.... but definitely put it on a dry rub afterwards and bbq.