Can I create an evaluation of the company itself and solicit input from my employees?

Collection of inputs about the company or answers to questions that are related to company performance rather than individual performance can be achieved by adding the company as one of the persons.

Evaluate the company as a person and send the evaluation out to the relevant evaluators; data gathered would be reported on the data points requested.

Avoid free-form content, since it is hard to analyze and does not yield data metrics for long-term analysis.