Smallest is the phone in your pocket.

My first amp sim was a Johnson j station I borrowed from a friend for a month or so. Then went cheap and bought a Behringer V-Amp 2. That had a great Fender black face, Marshall plexi and Vox AC 30 sims

I know I used the V Amp blackface sim on the clean and lead sounds on this recording. https://soundcloud.app.goo.gl/YeadyV7QzJku5dxi7

Recorded that around 2000-2001 if I recall correctly with a MIM strat.