I don't think so as aphids love tomato plants just as much as they love roses and are chronic problems on both plants in spring. ;)

More likely it was just a matter of timing. You don't indicate what zone you are in so it might not hold true for your area, but down here we see few aphids at this time of year. It is just too hot.

Dave

Marigold and basil makes good tomato plant buddies.

Here is a link that might be useful: Marigold

This is a more complete list

Basil repels flies and mosquitoes, improves growth and flavor.
Bee balm, chives and mint improve health and flavor.
Borage deters tomato worm, improves growth and flavor.
Dill, until mature, improves growth and health. Once mature, it stunts tomato growth.
Marigold deters nematodes.
Pot marigold deters tomato worm and general garden pests

Here is a link that might be useful: Companion Planting

Generally a lot of aphids in spring and then natural controls, such as lady bugs, kick in. Never have noticed any correlation between plants grown and bugs - except for marigolds which sure attract white fly! And spider mite!!