The genre "time management" gets slapped on many different kind of games, but since you mention Dash, I assume you mean the Diner Dash kind of time management games. I tried a lot of games in that genre and feel that there are a lot of mediocre games in it, sadly. Even the popular ones are often not great games. There are some good ones though. I like Cake Mania to the Max because it has the best upgrade mechanic - you continue to upgrade your bakery for 90 or so levels, so it really feels like your choices matter. Dancing Craze is also good. It does have the typical "open a new venue after a dozen or so levels" upgrade mechanic but at least it has nice difficulty choices, so it doesn't feel like you're just watching the game, like with so many of these games once you played a few. Mystic Emporium also has that. If you choose hard/expert mode and then go for 3 stars it offers a nice challenge. If you haven't checked out the Miriel games by 10tons, you should check those out too (they have lite versions).
I also wanted to recommend Ramen Delight because it offers some new twists to the genre and it has a great difficulty, but it looks like it has been pulled and I cannot find anything about it
If you played 90% of them you probably already have all of them except Ramen Delight, but you never know
I haven't played these games in over a year, so I don't know of any new games in the genre.