I used HP Thin Client T430 to smart my dumb TV as it has HDMI (although it just has a chip that converts DP to HDMI inside the box). Used ones are easily found and very cheap. Requires additional adapter for CEC though.
But for NextCloud instance I’d probably just go with ThinkCentre USFF rather than thin client (maybe 920q) as those are quite beefy for their size, while still being dirt cheap.
I used HP Thin Client T430 to smart my dumb TV as it has HDMI (although it just has a chip that converts DP to HDMI inside the box). Used ones are easily found and very cheap. Requires additional adapter for CEC though.
But for NextCloud instance I’d probably just go with ThinkCentre USFF rather than thin client (maybe 920q) as those are quite beefy for their size, while still being dirt cheap.