For what it's worth, this is what the dude might have looked like in the 60's and 70's while his hair was receding. But I think the folks who removed his beard were a little generous with his chin, judging from the back yard pic, and his last mug shot.
Here's one more thought. So he gave the names "Denise" and "Donna" as his dead wife's name when he was in the RV park in CA. That would seem to indicate that when he lied, he stayed close to a few facts and used real names. Denise was the mother, and Donna was the daughter. This might...
I'm no expert, but I'd look closely at the Ulos Jensen alias. That's not the sort of name a guy comes up with out of thin air. Curtis, Bob, Gordon... sure. Ulos?
I think Denise was around longer than anyone is positing.
1. Denise worked at a nursing home at one point before she disappeared. The LaPorte woman was listed as a nurse.
2. I can't see this dude taking care of a little girl for all that long by himself. Taking care of a child is a lot...