My hummers also go for the delphiniums, which at least grow tall, are perennial and also very pretty. So you could plant some in a container and not worry about having to overwinter it. Im assuming you dont live in the Arctic. :) There are also some honeysuckle that they love, but make sure if you buy some that they like the variety. Some honeysuckle just doesnt attract them.

We can give you better suggestions if you're more specific. I'm glad you added that this container will be on the porch. How big is the container? Did you want to hang up the container, set it on the porch floor, or something in between? Window box on a porch railing, perhaps? How much sun does your porch get? Do you care what the plant looks like in winter? If you want a plant that looks good year round to decorate your house in winter, that will narrow your options considerably.

I second the vote for fuchsias, with the caveat that you will need to choose the variety carefully. I think for your area you'll need to seek out heat-tolerant fuchsias. Fuchsias come in both trailing and upright shapes. I grow several different ones and have seen the hummers nectar on all of them. In my area, fuchsias are healthiest in either dappled shade all day, or morning sun followed by shade the rest of the day. Generally speaking, triphylla types can handle more sun and heat. I have heard that some people grow triphyllas in full sun but haven't tried it. For me, they fill a useful niche as a shade-tolerant hummingbird plant. I overwinter them in the garage too.

Two geraniums superbells (I'm still deciding)

begonia Fuschia, coleus, and basil

gerbera daisy