The executors' I have worked with over the past eight years all want to do their fiduciary duty well and the Alberta Surrogate Rules allow for them to be compensated within reason. There are some factors to consider though:
1. The residual beneficiaries have a say and will need to agree with the per cent you plan to take, from the whole of the estate.
2. From beginning to end get a big Calendar and start logging your time and duty of your work on the Estate. Including out-of-pocket expenses. A paper trail is your best friend at this point. If the beneficiaries what to see your work you should be able to produce it.
3. If there is more than one executor you have to share the compensation between the two or three executors.
Here is a good site from an Alberta website that I felt was a good read.