From what I've read online, I could suggest few different options:
1. TaskPanel (one word). It has task switching, task killing and ignore list. A lot of people saying that they tried everything else and this is the best one they got.
2. SystemPanel (also one word). "SystemPanel is a much more robust application when compared to Advanced Task Killer. It was not solely designed for task management, but more of a swiss army knife for Android resource monitoring with task killing capabilities. It does not include the automatic task killing option that Advanced Task Killer offers. SystemPanel compiles a list of all running applications and allows you to view information such as CPU and memory usage with the option to kill individual processes or all of them in one button click. SystemPanel offers a nice display of meters and charts to display CPU usage, memory usage and SD card usage. If you really want to drill down into the core of the Android operating system, SystemPanel would be the choice for you."
3. Astro File Manager (Astro Processes). Some people mentioned that if you're already using this app, the additional features (processes) is actually quite helpful.
and of course
4. Advanced Task Killer. I didn't like it, but might be useful for ya.