What is a good brand for tenor saxophones ?
Selmer, Keilwerth, Yamaha, Yanagisawa are some good saxophone brands.
Check out this post to read more in the post and the comments, https://saxstation.com/saxophone-brands.htm
Many players like the Selmer Mark VI’s best, but some are in bad condition and may need many repairs or be beyond repair. Within the brands the different models can be very different. Even the same model may feel/sound different.
Yamaha is a bit more affordable than the others.
Go try them out and see what you like!