Searching through that app still requires a plugin, and all the plugins I saw just seemed to be related to specific sites anyway - so you might as well just search on those sites.
Or is there a plugin that stands out over the rest?
No, but searching five sites at once from inside the application is simply a better and more time effective solution.
Can use prowlarr or jackett for that as well, but takes more setup
Understandtable, but if that's all it is, then there are already aggregate search websites.
qbittorrent search
Searching through that app still requires a plugin, and all the plugins I saw just seemed to be related to specific sites anyway - so you might as well just search on those sites.
Or is there a plugin that stands out over the rest?
No, but searching five sites at once from inside the application is simply a better and more time effective solution.
Can use prowlarr or jackett for that as well, but takes more setup
Understandtable, but if that's all it is, then there are already aggregate search websites.
https://github.com/qbittorrent/search-plugins/wiki/How-to-configure-Jackett-plugin
easily better than manually navigating websites