guacamole can be used as a central gateway to access any number of machines running different remote desktop servers (RDP, VNC, SSH…) while MeshCentral can use either an agent on the remote computer (Intel/AMD…) or agentless using Intel AMT (with more options specific to Intel AMT). It can be extended using/developing plugins.
Some users were asking for DASH support for AMD but as the developer works for Intel that won’t happen unless done by the community of users.
I’ve tried a minimal part of it over Ubuntu/Debian. By default it is started for only LAN but using the --cert parameter can be started with WAN support (forwarding necessary ports on the gateway). After switching from one mode to the other I found it easier for the machines to show up to restart the client service on remote computer.