I often notice when I'm playing finger-style, picking chords, that the bass of D and D minor feel underwhelming in comparison to surrounding chords (e.g. Am Dm Em). There's no deeper D on the fret board. Is there any other solution for changing that feel of the bassline getting "shallow" during D chords?

I realise drop-D tuning solves this problem, but I'd like to play in standard tuning since I'm pretty new to guitar (3 months).