There was Yabloko, but I wouldn't call it living party. Same for CPRF, another dead party on federal level. LDPR only pretends to be opposition on TV, you already can guess they are not. New People is sock puppet like LDPR.

On municipal level and in some regions things are slightly different:

LDPR had some popularity until Furgal's arrest and subsequent idiot acting governor. Members of Habarovsk Krai's LDPR either moved to UR(incumbent's party) or remained in opposition and moved to CPRF. Furgal was arrested because he was more popular than Putin in Habarovsk.

CPRF: extensive regional network, comparable to what Navalny had. While in some regions they are puppets for UR, in most of regions they are opposition to UR, actively register observers(Putin hates observers, they ruin his falsifications), can register you as candidate from federal party and usually are supported by Smart Voting(Navalny and his supporters). Have string teams in many regions.

Navalny's HQ(Shtab)/Russia of the Future: had extensive regional network that existed until his poisoning. Now it doesn't.

Yabloko: sometimes registers observers, usually doesn't, but sometimes does register good candidates, has strong team in Moscow and SpB, had strong team in Pskov. Sometimes supported by SV.

LDPR: shit in Moscow, had a lot of seats in east regions. It seems like they disappeared.

New People: Sock Puppet Party, but can randomly register humanoid candidate and sometimes this candidate wins.

On municipal elections even sock puppets has sometimes good candidates, but most municipal elections are FPTP.