I'm 6'4" with a 36" inseam and 36 waist....I have this down pretty well.
Depending on budget, Cabela's sells Tall sizes in a lot of the Cabela's branded stuff. I have or had lots of Cabela's branded clothing in tall sizes.
Sitka makes pants sizes that are tall, Sumpn is right, their shirts are too short in the sleeves. The pants are good length wise. I have multiple jackets and vests and the XL fits me fine in the length of the sleeves. Kuiu pants are long enough, although they don't advertise Tall sizes.
First Lite won't get my business because their pants are too short with no option for Tall sizes. I could go to a XL but then the waist is way too big.