Anything AMD from HD 4650 on up.
Anything NVIDIA from GT 440 on up.
An argument could be made that lower tier cards than those listed would do, but on a new build I wouldn't recommend anything less.
- if the TV is older than a year or so, and can't do "just scan" (and therefore either overscans or underscans), an Nvidia card might be better because their drivers make custom resolutions much easier, although AMD has overscan-underscan adjustments, but they don't always work perfectly.
- I only have experience with AMD multi-monitor, but my understanding is that AMD is generally more geared for this sort of thing.