Recommended upper blepharoplasty and canthopexy to fix asymmetry and droopiness of my eyes. Are these the best options?

You are likely seeing the wrong surgeon. You have upper eyelid ptosis. You need an upper eyelid ptosis repair not a skin removing surgery. Canthoplasty is appropriate. However if you say a surgeon who ignored your obvious bilateral anterior levator disinsertion ptosis, they should not do your surgery. You need to see an fellowship trained oculoplastic surgeon who routinely performed aesthetic ptosis surgery. Don't get the wrong surgery.

Either you misunderstood or you saw the wrong surgeon. A canthopexy can tighten the lateral ligament but what you need is a full canthoplasty with reinsertion of the ligament higher to change the tilt of your lids. This is a complex procedure and requires an expert. You could use an upper blepharoplasty, just not the way most are done. Your attachment of the levator, the muscle that voluntarily elevates you upper lid) has retracted upward and needs to be reinserted lower. This, too, requires an expert.