Android 19 post is still probably around Yardrat Goku's power, because Vegeta said they weren't as powerful as Trunks had suggested.
EDIT: Oh wait, this is pre absorption.
Well, in that case, I'd put 19 pre around SSj Trunks when he defeated Freeza, because he survived attacks from Sick Goku, who according to Piccolo, is close to his usual full power.
Chapter 341 (DBZ 147), P8.4-5, P9.
Piccolo: “Have you noticed too, Gohan?...”
Gohan: “Y-yes…”
Piccolo: “Son Goku is rushing the match for some reason…He’s already putting out close to his
full power…But even so, what’s with that miserable condition of his?...”
Tenshinhan: “Th-that miserable condition…!? What are you talking about? Goku’s overwhelmingly pushing him back…!”
Piccolo: “It’s not that. As a Super Saiyan, Goku’s power should be more stupendous than this…”
Android 20 pre I put stronger than 19 post, because he managed to surprise Vegeta with his speed.
Chapter: 345 (DBZ 151), P12.3
Context: after No.20 flees
Vegeta: “Damn it all! He’s quicker than I thought…!”