You haven't said how many days or miles per day you are planning but unless you are doing 30+ a day you need a bear canister to stay legal. Also, you haven't stated resupply but you are unlikely to be able to fit all of your food in an ursack from MTR till whitney which is your longest haul unless you are exiting the trail at Bishop or Independence.
For the JMT/PCT I wear a long sleeve Cap 1 or equivalent, long pants, boxer briefs, Wrightsocks, visor and bandanna. (That's 22.5oz plus shoes) Carried would be a 2.8oz windshirt and a Montbell ex light, balacleva and glove liners. (All except windshirt would be worn to bed.)