There is no definitive answer to this question as it largely depends on how you measure wealth. However, if we take a look at the estimated net worth of each of the main Star Wars actors, then Harrison Ford is likely to be the richest.
According to Celebrity Net Worth, Ford has an estimated net worth of $210 million. This puts him ahead of other major Star Wars actors such as Carrie Fisher ($85 million), Mark Hamill ($45 million) and Anthony Daniels (unknown).
Of course, these estimates may not be entirely accurate and there are other factors to consider such as property holdings and investments. Nevertheless, it seems safe to say that Harrison Ford is probably the richest actor from the Star Wars franchise.