I posted the most recent Los Angeles data sheet
here, looks like you found several venues from there. It is only 2 months old so the information is still pretty accurate. Given the criteria that you describe in your post, here's some recs (some are on your list, some aren't)
Downtown:
Edison - This would be your best bet, though you said you went last time so understandable that you should try other options first. Still, all in all this is a solid bar that tends to have cougars
Seven Grand - Fun spot, I'd say early 30s is close to average age, people tend to dress nicer there. Great whiskey selection. Its a good spot to drop past forsure.
Broken Shaker - Nice rooftop, they get a lot of the crowd that has been going to Perch and Standard in the past.
Avoid: Library Bar (pretty packed and small, younger crowd), Elevate (from what I hear that place is wack). I've never been to Suede so can't comment.
Hollywood:
No Vacancy - I would say is one of your best choices, its a really cool lounge/bar and has a mixed crowd age-wise. Perhaps leans younger but not too young. A little hipster.
La Descarga - It's a bit out of the way, but its a pretty cool Cuban-themed lounge that has a solid crowd and a good scene. Would recommend.
Highlight Room - Could be fun on a weekday afternoon/evening, but after 10 it will become a shitshow. Pretty good place to begin.
Avoid: Avalon (unless its after 2 and you still want to keep goin), Warwick/Tao/Avenue (will be really hard to get in unless you're throwing $$$)
Weho:
Of the places you mention, I would recommend EP/LP, Skybar, and Laurel Hardware. All of those are good.
I would also recommend Ysabel. It may be a little tricky at the door but you should be able to get in. Nice lounge with good drinks, lots of foreign girls, cougars as well.
Hyde I would recommend only if you're spending a lot of $ (though you will see stunners), Delilah/Doheny Room are pretty tricky to get in (unless going for dinner), and Nightingale is pretty similar to 1OAK so you wouldn't like it. Abbey is cool for the experience, but it is a high-energy, raging gay bar so I also don't think that would be a fit.
Overall... I would recommend staying in Weho/Hwood over Downtown, it's a bigger area with more variety, and you can have reasonable logistics for both of them (versus if you're in Downtown, it is annoying to get to Weho/Hwood).