I had a Gallien Krueger 400RB I used for about 12 years but switched to a Hartke combo (1155, haven't made it in a long time, has a 3500 amp with a 15" and a 5") about 12 years ago. It sounds good and is reasonably portable for a bass amp.
I used to have a Fender 400PS. It was way too big and heavy.
My favorite bass amp that I used to own was an Ampeg B25B, which I had from 1973 until 1983. Unfortunately, it was only 55 Wrms, which was a little marginal for the loud 70's and 80's. So I switched to the 200 W Gallien Krueger. I didn't realize at the time that a 200 W solid state amp doesn't sound much louder than a 55 W tube amp.
I recently got a 1971 Ampeg V4 which I slightly modified to make it a better fit for bass. This was an effort to satisfy my longing for the B25B, which would be loud enough for anything I do today. I added a toggle switch which switches out the mods if I want to use it with guitar. It is surprisingly loud for a 100 W amp. I'm happy with it, though I haven't used for a gig yet (I may next weekend).