Are there any other highly trusted and secure symmetric encryption algorithms besides AES? AES is the gold standard for symmetric encryption. It is highly trusted and highly secure. Do any other symmetric ciphers - besides OTP - come close to AES's usability, security, trust-ability?
ChaCha20


Provides 128 or 256-bit key space.
The best attack against 6 (128-bit) or 7 (256-bit) of 20 rounds
Stream cipher requires 64-bit nonce and 64-bit position counter
Used in TLS 1.3, OpenSSH, as well as BSD and Linux kernel RNGs
Part of ESTREAM portfolio


Serpent


Provides 128, 192, or 256 bit key space.
Best attack against 11 or 12 of 32 rounds
Block cipher with 128-bit block
AES competition finalist


Twofish


Provides 128, 192, or 256 bit key space.
Best attack against 6 of 16 rounds
Block cipher with 128-bit block and Feistel network design
AES competition finalist
Used in disk encryption software, OpenPGP standard, numerous applications


Deoxys-II


It provides 128 or 256-bit keyspace.
Authenticated encryption scheme with a 120-bit nonce, nonce misuse resistant
Based on 16-round tweakable block cipher using AES round function
Designed to provide better security than AES-GCM
Part of CAESAR portfolio for use case 3 (maximum security)


Camellia


Provides 128, 192, or 256-bit key space.
Block cipher with 128-bit block and Feistel network design
Patented but royalty-free
Used in OpenSSL, optional in OpenPGP and numerous other standards
Part of NESSIE and CRYPTREC portfolios


SEED


Provides 128-bit key space.
Best attack against 8 of 16 rounds
Block cipher with 128-bit block and Feistel network design
Used primarily in South Korea


CAST-256


Provides 128 to 256 bit security in 32-bit increments
Best attack against 28 of 48 rounds
Block cipher with 128-bit block and Feistel network design


There is the generic multi-target attack on n-bit key ciphers that requires less than the $2^n$ cipher evaluations.