For Ana, I'm thinking: Hawkmon - Aquilamon - Garudamon - Anubimon

For Ralph, I'm considering: Gottsumon - Monochromon - Triceramon - Ultimate Brachimon

For Space Marine Ralph, maybe: Hagurumon - Centaurumon - Knightmon - Alphamon

Oh man I wish I could remember more digimon

lol, I ended up looking up a list of Digimon and poking through until I found evolution chains I liked.

Here's the list I used: Visual List of Digimon - Wikimon - The #1 Digimon wiki

Babiiiiies