Best would be an old 70's amp called the crossmix made by pignose. A 75 watt combo. I bought one years ago after hearing a band in a bar with 2 guitar players both using them and getting an awesome tone, especially for ZZ top. Thickest tone i've ever gotten out of any amp. I remember using it for the first time in a bar we played many times and i had replace a boogie MK3 with it and the bartender remarked on how good it sounded. And i never knew her to ever remark about anything concering the band's tone in any respect. Don't remember why i sold it but i wish i had one know if i only had the room. I like those 80's marshall lead 12's a lot too, but they aren't loud enough to gig with. Worse by a million miles was a peavey practive amp who's name i can't even recall. I think from the 70's. It was so bad it was literally unusable. the second worse was my first amp ever.....a 70's peavey pacer. Not as bad as that last one, but pretty horrible.
By the way, this is based on drive tones. I didn't like the cleans much on any of them.