Best value for selling is undoubtedly PSA. If you are looking for the most $$, I would suggest waiting out the hold/pause and sending them in as bulk/value for grading near the end of the year (hopefully) and you’d probably have them back this time next year.
Obviously this is a long time away so you could grade any high value cards at the higher tiers in the meantime, or check out CGC as probably the second best option. Looks like you could get cards back in around a 1.5-2 month turnaround there, based on this thread.