(I’ve moved this to projects so you can get individualized recommendations based on your own requirements, since they are so specific. )
You should be able to do this with Lutron QS shades, Bali Springs Window Fashions, or Graber shades from Zebra Blinds. The QS option would be quite expensive, though, significantly more than zebra blinds I believe. And I don’t know how the Bali line is priced.
Lutron uses its own proprietary communications protocol, so you would also need to get their smart bridge pro device for integration. Zebra blind users Z wave and integrates directly to the smartthings hub. Bali has an official integration with SmartThings, but I don’t know of anyone who’s using it, so I haven’t heard anything about it one way or the other beyond the official announcement
@ZebraBlinds has a staff member who is quite active in this forum and should be able to answer any questions you have about their products. For Lutron or Bali, you would need to get in touch with their support.
There are also some DIY options which would save you some money but are quite a bit more effort to set up. For a double shade you would need to get a double mount and mount one in front of the other. You can see what some other community members have done by looking on the quick browse lists in the community – created wiki, looking down near the bottom of that page for the project report section, and choosing the “window coverings” list.
Anything which can work with smart things can work with echo, although it would generally be seen by Echo as a dimmer switch, so you would say things like “set to 50%” to open it halfway.