For General Midi
From Steinberg there was the Hypersonic VST, Sounds good
Unfortunately there are no more
Roland has the Virtual Sound Canvas, the Ios app is ok for the price, the Pc version is too expensive (only old sounds)
Probably Hallion is most likely to be recommended as VST (as far as I know, the Hyposonic is included as a Libary)
But a Sampler is not a Rompler
Otherwise I can recommend the Bass midi VST as a Soundfont Player and the search term Soundfont at Bittorrent
https://forum.renoise.com/t/recommended-freeware-vst-plugins/22645
No, a real software alternative to Hardware such as Roland Integra, unfortunately, I do not know 
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