Provided herein are engineered variants of archaeal polymerases that exhibit exonuclease-minus activity, enhanced thermostability, enhanced incorporation of 3′ modified nucleotides, improved uracil-tolerance and/or reduce sequence-specific errors in polymerase-catalyzed nucleotide binding and extension reactions relative to wild type polymerase enzymes. Also provided are uses of the engineered polymerases for forming complexed polymerases and forming binding complexes, and uses for conducting nucleic acid sequencing reactions.